WO2013080992A1 - Électrode de mesure eeg, élément de mesure eeg, et dispositif de mesure eeg - Google Patents

Électrode de mesure eeg, élément de mesure eeg, et dispositif de mesure eeg

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Publication number
WO2013080992A1
WO2013080992A1 PCT/JP2012/080707 JP2012080707W WO2013080992A1 WO 2013080992 A1 WO2013080992 A1 WO 2013080992A1 JP 2012080707 W JP2012080707 W JP 2012080707W WO 2013080992 A1 WO2013080992 A1 WO 2013080992A1
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WO
WIPO (PCT)
Prior art keywords
electroencephalogram
electroencephalogram measurement
electrode
scalp
metal
Prior art date
Application number
PCT/JP2012/080707
Other languages
English (en)
Japanese (ja)
Inventor
滋 外山
憲司 神作
高野　弘二
Original Assignee
財団法人ヒューマンサイエンス振興財団
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 財団法人ヒューマンサイエンス振興財団 filed Critical 財団法人ヒューマンサイエンス振興財団
Publication of WO2013080992A1 publication Critical patent/WO2013080992A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor
    • A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/291—Bioelectric electrodes therefor specially adapted for particular uses for electroencephalography [EEG]

Definitions

  • the present invention relates to an electroencephalogram measurement electrode, an electroencephalogram measurement member, and an electroencephalogram measurement apparatus.
  • Patent Document 1 includes a projecting portion having conductivity and being deformable by being formed of a conductive gel, and by contacting the projecting portion with the scalp, An electroencephalogram measurement electrode (chip portion) for measuring an electroencephalogram generated by brain activity is disclosed.
  • the electroencephalogram measurement electrode disclosed in Patent Document 1 is deformed when the protruding portion comes into contact with the scalp, so that the pressure applied to the scalp can be reduced and the burden on the scalp can be reduced.
  • the electroencephalogram measurement electrode using the conductive gel as disclosed in Patent Document 1 is easily deformed by the electroencephalogram measurement electrode (particularly the protruding portion), and the conductive gel portion is also deteriorated by drying. It was early. For this reason, the electroencephalogram measurement electrode may be disposable.
  • the present invention has been made in view of the above circumstances, and an electroencephalogram measurement electrode that can be used multiple times while suppressing the burden on the scalp, and an electroencephalogram measurement member and an electroencephalogram using the electroencephalogram measurement electrode It aims at providing a measuring device.
  • an electroencephalogram measurement electrode comprises: An electroencephalogram measuring electrode for measuring an electroencephalogram, The base, A protrusion made of rubber provided protruding from the base, and Provided at the tip of the protruding portion, electrically connected to the outside of the electroencephalogram measurement electrode, and in contact with the scalp when measuring the electroencephalogram, a contact portion made of metal, It is characterized by providing.
  • the protrusion is made of conductive rubber,
  • the contact portion is electrically connected to the outside via the protrusion. You may do it.
  • the contact portion is electrically connected to the outside via the conductor. You may do it.
  • the contact portion is formed integrally with the conductor, and is electrically connected to the outside via the conductor. You may do it.
  • the contact portion is composed of a plurality of metal particles. You may do it.
  • the contact portion is made of a metal film. You may do it.
  • the protrusion is at least partially covered with a metal film that is electrically connected to the outside. You may do it.
  • the spacer shortens the portion inserted between the hairs of the protruding portion when measuring the electroencephalogram, You may do it.
  • the electroencephalogram measurement member comprises: The electroencephalogram measurement electrode; A covering member that covers the scalp, and is attached so that the electroencephalogram measurement electrode contacts the scalp; It is characterized by providing.
  • an electroencephalogram measurement apparatus provides: Comprising the above electroencephalogram measurement electrode, It is characterized by that.
  • the electroencephalogram measurement electrode can be used multiple times while suppressing the burden on the scalp.
  • FIG. 1 is a schematic diagram showing an electroencephalogram measurement apparatus according to a first embodiment of the present invention. It is principal part sectional drawing of the electrode member with which the electroencephalogram measurement apparatus which concerns on the 1st Embodiment of this invention is equipped, and a cap. It is an expanded sectional view of the cover part of FIG. It is an expanded sectional view of the electrode for electroencephalogram measurement of FIG. It is the figure which looked at the electrode for electroencephalogram measurement of FIG. 2 from the direction which the protrusion part protrudes. It is sectional drawing of the electrode for electroencephalogram measurement which concerns on the 2nd Embodiment of this invention. It is sectional drawing of the electrode for electroencephalogram measurement which concerns on the 3rd Embodiment of this invention.
  • FIG. 1 is a schematic perspective view of an electroencephalogram measurement electrode according to a first embodiment of the present invention. It is a schematic perspective view of the electroencephalogram measurement electrode according to Modification 4 of the present invention.
  • the electroencephalogram measurement apparatus 1000 includes an electrode member 100, a cap 200, a lead wire 500, and a signal analysis apparatus 700.
  • the cap 200 covers the head and includes a holder part 210 and a cap part 220.
  • the cap part 220 has a helmet-like or hat-like shape, and is formed of an appropriate material such as a synthetic resin or cloth.
  • the cap unit 220 covers the scalp 400 of a subject (a person who is a subject who measures brain waves).
  • a plurality of holder portions 210 are provided on the cap portion 220 at a predetermined interval.
  • the holder part 210 is a cylindrical member attached to a through hole formed in the cap part 220. Although details will be described later, the electrode member 100 is attached to each holder portion 210.
  • the lead wire 500 is a conducting wire such as an insulated wire whose conductor is covered with an insulator.
  • the lead wire 500 has one end electrically connected to the electrode member 100 and the other end electrically connected to the signal analysis device 700.
  • the signal analysis device 700 is an electronic device such as a computer.
  • the signal analysis device 700 analyzes an electrical signal representing an electroencephalogram transmitted through the electrode member 100 and the lead wire 500, and performs a predetermined operation according to the analysis result.
  • the electrode member 100 includes a lid portion 20, a metal wire 30, and an electroencephalogram measurement electrode 40.
  • Each electrode member 100 is used by being attached to a holder portion 210 (in FIG. 2, hatching representing a cross section of the cap 200 is omitted).
  • the lid portion 20 is formed by a method such as injection molding using a resin material such as an epoxy resin, for example, and is formed in a shape that matches the holder portion 210. Specifically, as shown in FIGS. 2 and 3, the lid portion 20 is stretched from a columnar member 20 a and a portion (upper end portion in FIG. 2) opposite to the scalp 400 on the outer peripheral surface of the columnar member 20 a. And a flange portion 20b to be taken out. On the scalp 400 side of the lid portion 20 (the surface on the scalp 400 side of the cylindrical member 20a (the lower surface of the circular member 20a in FIGS. 2 and 3)), a cylindrical shape into which the electroencephalogram measurement electrode 40 can be inserted.
  • a resin material such as an epoxy resin
  • a hole 21 is formed, and the electroencephalogram measurement electrode 40 is inserted into the hole 21. Threads are formed on the inner peripheral surface of the holder portion 210 and the outer peripheral surface of the columnar member 20a so that the lid portion 20 and the holder portion 210 can be screwed together.
  • the flange portion 20b is formed so as to come into contact with the upper end surface (the surface on the side opposite to the scalp 400) of the holder portion 210 when the lid portion 20 and the holder portion 210 are screwed at a predetermined degree.
  • the cover part 20 may be formed from the synthetic resin etc. which have electroconductivity. At this time, the lid 20 is electrically connected to the electroencephalogram measurement electrode 40 and the metal wire 30.
  • the metal wire 30 has one end electrically connected to the electroencephalogram measurement electrode 40 and the other end electrically connected to the lead wire 500. As shown in FIG. 2, the metal wire 30 penetrates through the center of the lid portion 20 and is inserted almost at the center of the electroencephalogram measurement electrode 40 (base portion 50 described later) (in the drawing, the cross section of the metal wire 30 is shown). The hatching is omitted, and the metal wire 30 is indicated by a solid line). At this time, the metal wire 30 does not penetrate the electroencephalogram measurement electrode 40, and only the tip pierces the electroencephalogram measurement electrode 40. The metal wire 30 is not rotatable with respect to the electroencephalogram measurement electrode 40 and is rotatable with respect to the lid portion 20.
  • the metal wire 30 may not be inserted into the electroencephalogram measurement electrode 40 but may be in contact with the surface of the electroencephalogram measurement electrode 40 that is in contact with the lid portion 20. At this time, the electroencephalogram measurement electrode 40 is electrically connected to the metal wire 30. Further, since the metal wire 30 is only in contact with the electroencephalogram measurement electrode 40, it can be rotated with respect to the electroencephalogram measurement electrode 40.
  • a circular metal plate (the same shape as the upper surface of the hole 21) made of a metal material or the like may be provided on the surface of the lid 20 that contacts the upper surface of the hole 21.
  • the metal wire 30 is not inserted into the electroencephalogram measurement electrode 40 but is electrically connected to the metal plate. Further, the metal plate is electrically connected to the electroencephalogram measurement electrode 40.
  • the electrical signal transmitted to the base 50 is transmitted to the metal wire 30 through this metal plate.
  • the electroencephalogram measurement electrode 40 includes a base portion 50, a protruding portion 60, and a contact portion 70.
  • the base portion 50 and the protruding portion 60 are made of a deformable conductive rubber or the like, and are formed by an appropriate method such as molding.
  • the conductive rubber can be deformed by having elasticity (hereinafter, the same applies to various rubbers).
  • the conductive rubber is formed of, for example, an organic conductive polymer, a polymer material containing a conductive powder material (such as a liquid silicone resin), or a polymer material impregnated with an ionic liquid.
  • the conductive powder material for example, metal particles such as graphite, carbon nanotubes, and silver fine particles, AgCl particles, powder of organic conductive polymer, and the like are used.
  • the base portion 50 is formed in a substantially cylindrical shape that is circular when viewed from the lid portion 20.
  • the base portion 50 is fixed by inserting a metal wire 30 at the center of a circle on the side in contact with the lid portion 20 and is electrically connected to the metal wire 30. At least a part of the base portion 50 is accommodated in the hole 21 of the lid portion 20 and is held by a frictional force between the base portion 50 and the lid portion 20. At this time, the base portion 50 is slidable with respect to the lid portion 20.
  • the base part 50 does not provide the hole 21 of the lid part 20, but, for example, a fixing part (for example, a claw that hooks the base part 50) provided on the lower surface of the cylindrical member 20a, a fixing part such as an adhesive or an adhesive material. May be fixed to the lower surface of the cylindrical member 20a.
  • a fixing part for example, a claw that hooks the base part 50
  • a fixing part such as an adhesive or an adhesive material. May be fixed to the lower surface of the cylindrical member 20a.
  • the protrusion 60 is a substantially conical member formed of conductive rubber as described above, as shown in FIG. As shown in FIG. 2, the protrusion 60 is provided to protrude from the base 50 toward the scalp 400 and is electrically connected to the base 50. Referring to FIG. 5, the protruding portion 60 in the present embodiment is provided with seven protruding portions 60 on the scalp 400 side of the base portion 50. The number of protrusions 60 is not limited to this number, but it is desirable that a plurality of protrusions 60 be provided. In the present embodiment, the protruding portion 60 and the base portion 50 are integrally formed of the same material.
  • the protruding portion 60 may have a shape such as a cylindrical shape, a polygonal prism shape (a shape whose base and top sides are polygonal), and a polygonal pyramid (a shape whose bottom is polygonal).
  • the contact portion 70 is a metal lump formed of a metal material, that is, having conductivity. It is directly provided at the tip of the protrusion 60 so as to come into contact with the scalp 400. As a result, the contact portion 70 is also electrically connected to the protruding portion 60. For example, when the base portion 50 and the protrusion portion 60 are molded, the contact portion 70 is directly fused to the protrusion portion 60 (for example, a method such as insert molding) or by a fixing material such as a conductive adhesive material. The protrusion 60 is fixed and provided.
  • the metal lump constituting the contact portion 70 may be a single component such as silver, gold, platinum, or titanium, but is made of an alloy, a conductive metal oxide, a conductive chloride, or the like.
  • the contact part 70 may use a different component by the inside and the exterior, for example, may use silver inside and may use silver chloride outside.
  • the protrusion 60 is electrically connected to the metal wire 30, and the metal wire 30 is electrically connected to the lead wire 500. Therefore, the protrusion 60 and the contact portion 70 are connected to the signal analysis device 700. It is also connected electrically.
  • “Electrically connected” means that both of the connection targets are directly connected, and both of the connection targets (for example, the contact portion 70 and the signal analysis device 700) are connected to other conductive members (for example, the protruding portion 60). And at least one of the two (for example, the contact portion 70) and the other (for example, the signal analysis device 700) are connected to each other so that electricity flows. Is also included.
  • the electroencephalogram measurement electrode 40 presses the scalp 400 with a pressure corresponding to the tightening degree of the lid 20. Therefore, the pressure applied to the scalp 400 of the electrode member 100 can be finely adjusted by adjusting the degree of rotation of the lid 20.
  • the lid portion 20 enters the holder portion 210 by a predetermined distance, the flange portion 20b comes into contact with the upper end surface of the holder portion 210 (the end surface opposite to the scalp 400 in FIG. 2). Thereby, it can prevent that the cover part 20 approachs into the holder part 210 too much.
  • the lead wire 500 is connected to the metal wire 30 after adjusting the degree of rotation of the lid portion 20.
  • the electroencephalogram measurement electrode 40 including the base portion 50 is slidably inserted into the lid portion 20, it can rotate independently with respect to the lid portion 20. Normally, the lid 20 and the electroencephalogram measurement electrode 40 rotate together. However, since the lid 20 supports the electroencephalogram measurement electrode 40 so as to be rotatable, the protruding portion 60 of the electroencephalogram measurement electrode 40. When a force that impedes rotation of the electroencephalogram measurement electrode 40 is applied to the electroencephalogram measurement electrode 40, such as when the hair enters between the electrodes or the contact portion 70 contacts the scalp, the lid portion 20 It rotates independently of the measurement electrode 40, so that the electroencephalogram measurement electrode 40 does not rotate.
  • the metal wire 30 may be prevented from rotating by connecting the lead wire 500 or the like, and the electroencephalogram measurement electrode 40 may not be rotated even when the lid portion 20 is rotated. Thereby, since the electroencephalogram measurement electrode 40 does not rotate from the beginning, the risk of the electroencephalogram measurement electrode 40 getting involved in the hair is reduced.
  • an electrical signal from the scalp 400 will be described. Electrical signals are transmitted from the scalp 400 to the contact portion 70 that has come into contact with the scalp 400 in accordance with various brain activities.
  • the contact portion 70 that has come into contact with the scalp 400 receives an electrical signal from the scalp 400.
  • This electrical signal represents an electroencephalogram.
  • the transmitted electrical signal is transmitted in the order of the protrusion 60, the base 50, the metal wire 30, and the lead wire 500 (when the above-described metal plate is provided on the base 50, from the base 50, An electric signal is transmitted to the metal wire 30 via the metal plate) and supplied to the signal analysis device 700.
  • the signal analysis device 700 analyzes the supplied electrical signal and identifies the electroencephalogram represented by the electrical signal. In this way, the signal analysis device 700 measures the electroencephalogram.
  • the signal analysis device 700 analyzes the measured electroencephalogram, analyzes the idea of the person (the owner of the measured electroencephalogram), and performs a predetermined operation according to the analysis result. For example, the signal analysis device 700 outputs an analysis result or performs an operation in response to the analysis result.
  • the protrusion part 60 since the protrusion part 60 is provided between the base part 50 and the scalp 400, when the cover part 20 enters the holder part 210, the protrusion part 60 enters between the hairs and protrudes.
  • the contact part 70 provided at the tip of the part 60 contacts the scalp 400. That is, the electrode member 100 easily contacts the scalp 400 and easily receives an electrical signal from the scalp 400. If the protrusion 60 is not provided, if there is scalp on the surface of the scalp 400, the scalp may be sandwiched between the base 50 and the scalp 400, and the contact part 70 may contact the scalp 400. This may make it difficult to receive electrical signals from the scalp 400.
  • the protrusion 60 is formed of rubber as described above, has elasticity, and can be deformed. Therefore, even if the hair wraps around, the protrusion 60 does not pull the hair strongly, and may cause pain or discomfort to the subject. small.
  • the contact portion 70 comes into contact with the scalp 400, the contact portion 70 is made of a metal material (the contact portion of the electrode member 100 with the scalp 400 is hard), which may cause pain and discomfort to the subject.
  • the protrusion 60 according to the present embodiment has the hardness that the contact portion 70 (metal material) gives to the scalp 400 because the protrusion 60 can be deformed (in particular, the protrusion 60 has flexibility). And bends flexibly) and is less likely to cause pain or discomfort to the subject.
  • the burden on the scalp 400 can be suppressed by deformation (here, bending) of the protrusion 60.
  • the electroencephalogram measurement electrode 40 may be disposable.
  • the protruding portion 60 is formed of rubber, and the electrical signal from the scalp 400 is received (detected) by the contact portion 70 of the metal material. It is possible to use multiple times while suppressing.
  • the inventor of the present application uses the scalp 400 for the contact portion 70 formed of conductive rubber (that is, the contact portion 70 in the case where the electroencephalogram measurement electrode 40 is integrally formed of conductive rubber including the contact portion 70).
  • the contact portion 70 is formed of a metal material.
  • the electroencephalogram measurement electrode 40 electroencephalogram measurement apparatus 1000
  • the electroencephalogram can be accurately measured by providing the contact portion 70 formed of the metal material at the tip of the protrusion 60.
  • the burden on the scalp 400 can be suppressed.
  • the electroencephalogram measurement apparatus 1000 including the electroencephalogram measurement electrode 40 is, for example, a brain-machine interface (BMI) or a brain-computer interface (Brain-Computer Interface), which has recently been attracting attention for its usefulness. : Used as BCI).
  • BMI (hereinafter, unless otherwise specified, BMI is used as a term representing a concept including BCI) is an electrical signal that represents an electroencephalogram generated by brain activity, and is directly used as a computer or the like. It is an interface of the format to input to the electronic equipment. This is expected to enable more intuitive operation of electronic devices such as computers. In addition, since it is possible to operate a computer or the like without using limbs, it is also expected to be applied in the fields of welfare, medical care, and nursing care.
  • the contact part 70 is comprised with the several metal particle 71 smaller than the metal lump used in 1st Embodiment instead of the single metal lump like 1st Embodiment. Yes.
  • the metal particles 71 are formed of a metal material as in the first embodiment.
  • the metal particles 71 are embedded at the tip of the protrusion 60, and at least a part of the metal particle 71 is exposed on the scalp 400 side of the protrusion 60.
  • each metal particle 71 is electrically connected to the protrusions 60 by the above-described embedding. As a result, as in the first embodiment, each metal particle 71 is also electrically connected to the metal wire 30, the lead wire 500, the signal analysis device 700, and the like. Since each metal particle 71 is formed of a metal material, the metal particle 71 can accurately measure an electroencephalogram as in the first embodiment. The electrical signal received by the metal particles 71 is transmitted in the order of each metal particle 71, the protrusion 60, the base 50, the metal wire 30, the lead wire 500, and the signal analysis device 700. Further, unlike the electroencephalogram measurement electrode 40 according to the first embodiment, each metal particle 71 according to the second embodiment is added to the scalp 400 by making the contact portion 70 into a plurality of small metal particles 71. Disperse pressure and give subject softness.
  • the electroencephalogram measurement electrode 40 according to the third embodiment includes a metal part 70a, a first metal film 70b, and a second metal film 70c (in FIG. The hatching representing the cross section of the first metal film 70b and the second metal film 70c is omitted, and the first metal film 70b and the metal film 70c are indicated by bold lines).
  • the metal portion 70 a is a metal lump formed of a metal material, that is, having conductivity, and is directly provided at the tip of the protruding portion 60.
  • the first metal film 70b covers the metal part 70a.
  • the second metal film 70c covers the portions which may contact with the scalp 400 of the projecting portion 60.
  • the first metal film 70b and the second metal film 70c are integrally formed of a metal material by a method such as vapor deposition or plating.
  • the first metal film 70b and the second metal film 70c may be formed separately.
  • the first metal film 70b and the second metal film 70c can be deformed, and are configured to maintain the deformation of the protruding portion 60.
  • the first metal film 70b and the second metal film 70c are electrically connected to the metal part 70a, the protruding part 60, etc., and electrically connected to the outside of the electroencephalogram measurement electrode 40.
  • the contact part 70 in the third embodiment is composed of a metal part 70a and a first metal film 70b.
  • the first metal film 70b and the metal film 70c can receive an electrical signal from the scalp when in contact with the scalp.
  • the protrusion 60 is deformed when coming into contact with the scalp 400, and may be deformed (bent) so as to be bent, for example. In this case, there is a possibility that the protrusion 60 (particularly, the side surface near the metal portion 70a) contacts the scalp 400. However, since the protrusion 60 is made of conductive rubber, it may be difficult to receive an electrical signal from the scalp 400.
  • the second metal film 70c formed of a metal material causes the protrusion 60 (particularly a portion that may come into contact with the scalp 400 due to deformation of the protrusion 60). Coating. As a result, even if the projecting portion 60 is deformed, the second metal film 70c comes into contact with the scalp 400, so that the electroencephalogram measurement electrode 40 can easily receive an electrical signal from the scalp 400 by the second metal film 70c.
  • the electrical signal received by the first metal film 70b is transmitted in the order of the metal portion 70a, the protruding portion 60, the base portion 50, the metal wire 30, the lead wire 500, and the signal analyzing device 700.
  • the electrical signal received by the second metal film 70c is transmitted in the order of the protruding portion 60, the base portion 50, the metal wire 30, the lead wire 500, and the signal analyzing device 700.
  • the first metal film 70b and the second metal are formed by performing vapor deposition, plating, or the like on the tip of the protrusion 60 without providing a metal lump at the tip of the protrusion 60.
  • the film 70c may be formed.
  • the first metal film 70b is a part that can come into contact with the scalp 400 when the protruding part 60 is not deformed, and the second metal film 70c can be brought into contact with the scalp 400 when the protruding part 60 is deformed. Part. That is, the contact portion 70 is configured only by the first metal film 70b.
  • the electroencephalogram measurement electrode 40 according to the fourth embodiment further includes a metal plate 85a and a conductor 80 (in FIG. 8, the hatching representing the cross section of the conductor 80 is omitted, and the conductor 80 is indicated by a solid line).
  • the metal plate 85a is formed of a conductive metal material, and is provided in a portion of the electrode member 100 that is in contact with the lid portion 20.
  • the metal wires 30 are electrically connected to the metal plate 85a.
  • the metal wire 30 is electrically connected to the metal plate 85a so as not to rotate with respect to the metal plate 85a (for example, by not soldering the metal wire 30 and the metal plate 85a).
  • the conducting wire 80 is made of a conductive metal material and is formed in a thin line shape that can be deformed (here, has flexibility), and the projecting portion 60 cannot be deformed by the conducting wire 80.
  • the metal plate 85a and the conductive wire 80 may be a single component such as silver, gold, platinum, or titanium, but are made of an alloy, a conductive metal oxide, a conductive chloride, or the like. Is desirable.
  • the conducting wire 80 passes through the inside of the projecting portion 60 and the base portion 50, one end is electrically connected to the contact portion 70, and the other end is electrically connected to the metal plate 85a.
  • the electrical signal received from the scalp 400 by the contact portion 70 is transmitted to the metal plate 85 a via the conductor 80.
  • the protrusion part 60 and the base part 50 which concern on 4th Embodiment are formed with the elastic rubber (synthetic rubber, natural rubber, etc.) which can deform
  • the protrusion 60 and the base 50 do not have conductivity (without using an organic conductive polymer or conductive powder material) via the metal plate 85a and the conductive wire 80.
  • EEG can be measured.
  • the protrusion part 60 and the base part 50 may have electroconductivity.
  • the electrical signal received by the contact unit 70 is transmitted in the order of the conductive wire 80, the metal plate 85 a, the metal wire 30, the lead wire 500, and the signal analysis device 700.
  • the electroencephalogram measurement electrode 40 according to the fifth embodiment includes a metal plate 85 b and a wire (conductive wire) 82 (in FIG. 9, the hatching representing the cross section of the wire 82 is omitted).
  • the wire 82 is indicated by a solid line).
  • the metal plate 85b is formed of a conductive metal material, and is provided in a portion of the electroencephalogram measurement electrode 40 that is in contact with the lid portion 20.
  • the metal wire 30 is electrically connected to the metal plate 85b.
  • the metal wire 30 is electrically connected to the metal plate 85b so as not to rotate with respect to the metal plate 85b (for example, by not soldering the metal wire 30 and the metal plate 85b).
  • the wire 82 is made of a conductive metal material, and is formed in a deformable (flexible) thin line shape. The wire 82 does not prevent the protrusion 60 from being deformed.
  • the metal plate 85b and the conductive wire 80 may be a single component such as silver, gold, platinum, or titanium, but are made of an alloy, a conductive metal oxide, a conductive chloride, or the like. Is desirable. As shown in FIG.
  • the wire 82 passes through the inside of the projecting portion 60, and a part of the wire 82 is exposed to the outside from the scalp 400 side (tip) of the projecting portion 60.
  • the electrical signal is received from the scalp 400 in the same manner as the contact unit 70 according to the embodiment. That is, the contact part 70 of 5th Embodiment is comprised by the part exposed outside from the protrusion part 60 among the wires 82. FIG. One end or both ends of the wire 82 are electrically connected to the metal plate 85b.
  • the protrusion part 60 and the base part 50 which concern on 5th Embodiment are formed with the elastic rubber (synthetic rubber, natural rubber, etc.) which can deform
  • the electroencephalogram can be measured via the metal plate 85b and the conductive wire 80 without the projecting portion 60 and the base portion 50 having conductivity.
  • the protrusion part 60 and the base part 50 may have electroconductivity.
  • the electrical signal received by the contact unit 70 is transmitted in the order of the wire 82, the metal plate 85b, the metal wire 30, the lead wire 500, and the signal analysis device 700.
  • the electroencephalogram measurement electrode 40 may further include a spacer 90 as shown in FIG.
  • the spacer 90 adjusts the length of the protrusion 60 that enters between the hairs by contacting the hairs.
  • the spacer 90 is formed of a synthetic resin or the like (for example, has an insulating property.
  • the spacer 90 may have a conductive property), and is fixed to the scalp 400 side of the base portion 50 and provided between the protruding portions 60. .
  • the spacer 90 is formed to increase the length in the direction in which the protruding portion 60 protrudes and shorten the length of the protruding portion 60 protruding from the base portion 50 as the density or amount of hair decreases.
  • the length of the protrusion 60 entering between the hairs is shortened, and when the density or amount of the hair is large, the length of the protrusion 60 between the hairs. Since the length of penetration increases, the contact portion 70 at the tip of the protruding portion 60 does not pierce the scalp 400 excessively, so that an appropriate pressure can be applied to the scalp 400, and stress applied to the scalp 400 is reduced. Is done.
  • the lid 20 may be as shown in FIG.
  • the lid portion 20 further includes a convex portion 22 a on the inner peripheral surface of the columnar member 20 a included in the lid portion 20.
  • the convex part 22a of the cover part 20 is formed in a ring shape so as to go around the inner peripheral surface of the columnar member 20a.
  • the electroencephalogram measurement electrode 40 is caught by the convex portion 22a, it is possible to prevent the electrode member 100 from being accidentally detached from the lid portion 20 and to handle the electrode member 100 more easily.
  • the convex portion 22a is formed in a ring shape so as to go around the inner peripheral surface of the lid portion 20, the electroencephalogram measurement electrode 40 can be rotated in the horizontal direction.
  • the lid 20 further includes a convex portion 22b on the outer peripheral surface of the columnar member 20a.
  • the convex portion 22b is formed in a ring shape that goes around the outer peripheral surface of the cylindrical member 20a.
  • the holder part 210 further includes a plurality of recesses 230 on the inner peripheral surface. Each recess 230 is formed in a ring shape that goes around the inner peripheral surface of the holder part 210.
  • each concave portion 230 meshes with the convex portion 22b, so that the distance (up and down direction in FIG.
  • the position of the lid part 20 is determined in multiple stages with respect to the holder part 210. Therefore, when it is desired to change the degree of insertion into the holder part 210 of the electrode member 100 after the electroencephalogram measurement electrode 40 is brought into contact with the scalp 400, the degree is changed without turning the electrode member 100. be able to.
  • the cover part 20 is the direction of the surface which contact
  • the cylindrical member 2a and the holder portion 210 are not formed with threads that are screwed together.
  • FIG. 17 is a view in which a part of the entire electroencephalogram measurement electrode 40 according to Modification 4 is cut out and described, and hatching representing a cross section of the base portion 50 is omitted.
  • the electroencephalogram measurement electrode 40 will be described in more detail with reference to Example 1.
  • FIG. 1 the electrode member 100 (electroencephalogram measurement electrode 40) and the cap 200 according to the first embodiment shown in FIG.
  • a commercially available stainless steel female screw (diameter: 16 mm) was attached to the cylindrical through hole using a silicone-based adhesive. This female screw functions as the holder part 210 in the first embodiment.
  • the lid 20 was prepared by pouring an epoxy-based room temperature curing resin Technobit (registered trademark) 4004 into a mold having a predetermined shape and curing it. At this time, a silver wire (corresponding to the metal wire 30) having a diameter of 0.5 mm and a length of 20 mm is inserted in the center, and the silver wire is inserted so that both ends of the silver wire come out of the lid portion 20. The position of the silver wire was adjusted so that the length of the silver wire inserted into the electroencephalogram measurement electrode 40 was about 5 mm. After curing, the epoxy-based room temperature curing resin technobit was taken out. And after taking out the said molding, the lead wire 500 was soldered to the silver wire exposed from the surface (upper surface in FIG. 2) by which the flange part 20b of the cover part 20 is arrange
  • Technobit registered trademark
  • the electroencephalogram measurement electrode 40 was produced using a mold 600 shown in FIG. As shown in FIG. 13, the mold 600 includes an upper mold 610 and a lower mold 620. The upper mold 610 and the lower mold 620 can be separated.
  • the upper mold 610 is formed with seven substantially conical holes having a height of 5 mm and an inner diameter of a cylindrical hole of 16 mm, and the lower mold 620 having an inner diameter of 1.5 mm and a depth of 5 mm. I used what is.
  • An alloy (corresponding to a metal lump of the contact portion 70) was inserted into each of the substantially conical holes of the lower mold 620, and the conductive resin paste was poured into the mold 600.
  • the extracted conductive resin paste is the electroencephalogram measurement electrode 40 according to the first embodiment.
  • the conductive resin paste is obtained by kneading a liquid silicone resin and carbon nanotubes on a weight basis of 92.5% and 7.5%, respectively.
  • Example 2 the electroencephalogram measurement electrode 40 according to the fourth embodiment shown in FIG. 8 was produced.
  • the cap 220 and the lid part 20 were produced by the same procedure as in Example 1. However, in Example 2, the lid part 20 is produced so that the silver wire inserted into the lid part 20 is not inserted into the electroencephalogram measurement electrode 40.
  • Example 2 the electroencephalogram measurement electrode 40 is formed using the same mold 600 as in Example 1.
  • a silver wire (corresponding to the conductive wire 80) was inserted into the mold 600.
  • the silver wire was inserted into the mold 600 so that one end was electrically connected to each alloy.
  • the silver wire has a diameter of 0.5 mm and a length of 10 mm.
  • a resin paste not containing carbon nanotubes that is, a non-conductive resin paste
  • the resin paste is solidified, and the solidified resin paste is taken out from the mold 600.
  • a metal plate (corresponding to the metal plate 85a) was attached to the solidified resin paste so as to be electrically connected to the other end of the silver wire.
  • the electroencephalogram measurement electrode 40 according to the fourth embodiment is obtained.
  • Example 3 the electroencephalogram measurement electrode 40 according to the fifth embodiment shown in FIG. 9 was produced.
  • the cap 220 and the lid part 20 were produced by the same procedure as in Example 1. However, in Example 3, the lid part 20 is produced so that the silver wire inserted into the lid part 20 is not inserted into the electroencephalogram measurement electrode 40.
  • Example 3 the electroencephalogram measurement electrode 40 is formed using the same mold 600 as in Example 1.
  • a silver wire (corresponding to the wire 82) was inserted into each conical hole of the lower mold 620.
  • the silver wire has a diameter of 0.1 mm and a length of 20 mm, and is bent into a hairpin shape at substantially the center.
  • a resin paste containing no carbon nanotubes that is, a resin paste having no electrical conductivity
  • the solidified resin paste was taken out from the mold 600.
  • a metal plate (corresponding to the metal plate 85b) was attached to the solidified resin paste so as to be electrically connected to one end of the silver wire. From the above, the electroencephalogram measurement electricity 40 according to the fifth embodiment is obtained.
  • BMI is an interface that reads an electrical signal representing an electroencephalogram generated by brain activity and directly inputs it to an electronic device.
  • Electroencephalogram measurement was carried out by the following procedure using the cap prepared in Example 1 and an electroencephalogram measurement electrode (cap with electroencephalogram measurement electrode).
  • a cap was put on the subject.
  • the electrode member was inserted into the holder part attached to each through-hole of the cap so that the protruding part was directed to the scalp.
  • the electrode member (particularly, the electroencephalogram measurement electrode) was used after being disinfected with ethanol for disinfection immediately before use.
  • the lid was rotated and attached to the holder so that the lid was in a predetermined position relative to the holder.
  • the electroencephalogram measurement electrode was fastened to the holder part, the electroencephalogram measurement electrode also rotated with the rotation of the lid part at first.
  • the electroencephalogram measurement electrode does not rotate and the lid part does not rotate. Only independently rotated and the electroencephalogram measurement electrode was pressed against the scalp. For this reason, the electroencephalogram measurement electrode did not involve the subject's hair. At this time, the subject confirmed wearing feeling, but no subject complained of pain or discomfort. Therefore, it was confirmed that the electroencephalogram measurement electrode produced in Example 1 is less likely to cause pain and discomfort to the subject by involving the hair and applying excessive pressure to the scalp.
  • the lead wire connected to the electrode member is connected to a commercially available electroencephalograph (manufactured by g.tec), and the scalp and electroencephalogram
  • the impedance between the measurement electrodes was measured. All measured values were 15 k ⁇ or less, and it was confirmed that a sufficient degree of conduction was ensured for BMI. Further, the electroencephalogram measurement electrodes prepared in Example 2 and Example 3 were measured in the same manner, and it was confirmed that the measured value was 15 k ⁇ or less.
  • FIGS. 14 and 15 an example (graph) of an electroencephalogram measured by the electroencephalogram measurement electrode according to Example 1 is shown using FIGS.
  • the graphs shown in FIGS. 14 and 15 are obtained by converting an analog voltage into a digital voltage using an analog-to-digital converter circuit of an electroencephalograph, and setting 1LSB (minimum resolution) to 0.24 pV.
  • the data of the voltage (measured electroencephalogram) are shown.
  • the electrical signal (voltage) from the scalp is converted into a notch filter by a biquad filter with a bandwidth of 2 Hz centering on 50 Hz and a 20 th order from 1 Hz to 45 Hz.
  • an electroencephalogram was measured using an electroencephalogram measuring electrode (contact portion formed from an electrically conductive rubber) formed only from an electrically conductive rubber, an ⁇ wave and an electroencephalogram representing blinking could not be measured in the first place. Therefore, when the electroencephalogram was measured using the electroencephalogram measurement electrode according to Example 1, it was confirmed that the electroencephalogram could be measured with higher accuracy than when the contact portion was formed from conductive rubber. As described above, it was confirmed that the electroencephalogram measurement electrode according to Example 1 can accurately measure the electroencephalogram without applying excessive pressure to the scalp. Moreover, since the same impedance as Example 1 is obtained also about Example 2, 3, even when using the electroencephalogram measurement electrode according to Example 2, 3, it is applied to the scalp similarly to Example 1. On the other hand, it is considered that the electroencephalogram can be accurately measured without applying excessive pressure.
  • Electroencephalogram Measurement Device 100 Electrode Member 20 Lid 20a Columnar Member 20b Flange 21 Hole 22a Convex 22b Convex 30 Metal Wire 40 Electroencephalogram Electrode 50 Base 60 Protrusion 70 Contact Part 71 Metal Particle 70a Metal Part 70b First 1 metal film 70c second metal film 80 conductive wire 82 wire 85a metal plate 85b metal plate 90 spacer 200 cap 210 holder portion 220 cap portion 230 concave portion 400 scalp 500 lead wire 600 mold 610 upper mold 620 lower mold 700 signal analysis device

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Abstract

La présente invention concerne une électrode de mesure EEG (40) pour mesurer un EEG qui comprend : une partie de base (50) ; des parties saillantes (60) constituées de caoutchouc et disposées de manière à faire saillie depuis la partie de base ; et des parties de contact (70) constituées de métal, qui sont disposées sur les extrémités avant des parties saillantes, électriquement connectées de façon externe à l'électrode de mesure EEG, et qui entrent en contact avec le cuir chevelu lors de la mesure de l'EEG.
PCT/JP2012/080707 2011-11-30 2012-11-28 Électrode de mesure eeg, élément de mesure eeg, et dispositif de mesure eeg WO2013080992A1 (fr)

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WO2020261773A1 (fr) * 2019-06-25 2020-12-30 住友ベークライト株式会社 Électrode biomédicale, capteur biomédical et système de mesure de biosignal
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US10456058B2 (en) * 2016-02-10 2019-10-29 Brian Products Gmbh Sensor device or EEG electrode and cap having a plurality of sensor devices
US20170224278A1 (en) * 2016-02-10 2017-08-10 Brain Products Gmbh Sensor device or eeg electrode and cap having a plurality of sensor devices
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US20210000371A1 (en) * 2018-10-17 2021-01-07 Nok Corporation Bioelectrode and method for producing bioelectrode
JP6708322B1 (ja) * 2018-10-26 2020-06-10 住友ベークライト株式会社 生体用電極、生体センサーおよび生体信号測定システム
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WO2020085035A1 (fr) * 2018-10-26 2020-04-30 住友ベークライト株式会社 Bioélectrode, capteur biologique, et système de mesure de signal biologique
EP3871595A4 (fr) * 2018-10-26 2022-07-13 Sumitomo Bakelite Co.Ltd. Bioélectrode, capteur biologique, et système de mesure de signal biologique
JP6888747B1 (ja) * 2019-06-25 2021-06-16 住友ベークライト株式会社 生体用電極、生体センサー、及び生体信号測定システム
WO2020261773A1 (fr) * 2019-06-25 2020-12-30 住友ベークライト株式会社 Électrode biomédicale, capteur biomédical et système de mesure de biosignal
EP3900572A1 (fr) * 2020-04-20 2021-10-27 Mooyoo Co., Ltd Barre de massage de promoteur de circulation sanguine de la peau et son procédé de couplage
JP2021171649A (ja) * 2020-04-20 2021-11-01 有限会社Ｇ．Ｍコーポレーション 皮膚血液循環活性器用マッサージピン及びその結合方法
JP7140423B2 (ja) 2020-04-20 2022-09-21 有限会社Ｇ．Ｍコーポレーション 皮膚血液循環活性器用マッサージピン及びその結合方法

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