WO2010038393A1 - 脳内情報計測装置 - Google Patents
脳内情報計測装置 Download PDFInfo
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- WO2010038393A1 WO2010038393A1 PCT/JP2009/004877 JP2009004877W WO2010038393A1 WO 2010038393 A1 WO2010038393 A1 WO 2010038393A1 JP 2009004877 W JP2009004877 W JP 2009004877W WO 2010038393 A1 WO2010038393 A1 WO 2010038393A1
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- A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
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Definitions
- the present invention relates to a brain information measuring apparatus that collects information in a brain of a subject that is a variety of animals such as humans, laboratory animals, livestock, and pets.
- the invasive type involves some kind of surgical operation such as incision of the scalp or skull of a subject in order to bring an electrode or the like into direct contact with the brain.
- the non-invasive type refers to accessing the brain indirectly from the outside of the subject's head (that is, through the scalp, skull, etc.) and extracting some information in the brain.
- such a conventional invasive intracerebral information measuring device is basically mounted with the brain of the subject incised and the brain exposed.
- it is necessary to cut the skull in a wide area.
- Such a surgical operation involving the incision of the skull is itself a large-scale operation, and the burden on the subject is very large. There is also a high risk of infection.
- non-invasive brain function measurement excellent measurement technologies such as f-MRI (functional magnetic resonance) imaging and optical topography have been developed and have achieved great results in the field of diagnosis and research.
- f-MRI functional magnetic resonance
- optical topography measurement method it is possible to measure changes in the local blood volume of the subject's brain, which is useful for diagnosing cerebrovascular disorders and the like (see Patent Document 1, etc.).
- it is difficult to improve performance such as resolution and sensitivity because such measurement is limited to indirect measurement.
- the accuracy of information near the surface of the brain is relatively high, it is difficult to acquire information in the deep part of the brain.
- the conventional optical measurement method cannot acquire information on the deep part of the brain.
- the present invention has been made in view of the above problems, and the main object of the present invention is that it can be mounted without requiring a large-scale surgical operation, and is less invasive to a subject. It is an object to provide a brain information measuring apparatus that can perform high-sensitivity and high-resolution measurement while reducing the burden on the patient and reducing the risk.
- the present invention made to achieve the above object is a brain information measuring device for collecting information in the brain of a subject, a) A probe unit that is inserted into the brain or inserted into the brain groove through a through-hole drilled in the skull of the subject, and has an electrode that captures at least the surrounding electrical signal, and is provided integrally with the end of the probe unit.
- An in-vivo mounting portion comprising: a head portion having a signal sending portion that is sandwiched between a skull and a scalp of a subject and at least transmits an electric signal captured by the electrode to the outside of the scalp; b) an external measurement unit that is installed outside the scalp of the subject and receives a signal transmitted from the signal transmission unit of the head unit through the scalp; It is characterized by having.
- Subjects here include not only humans but also various animals such as laboratory animals, livestock, and pets.
- one form of the outer shape of the body mounting portion is a thumbtack (push pin) -like or a nail-like.
- the probe portion may be rigid or flexible.
- a part of the scalp of the subject is cut open, and a through hole having a diameter slightly larger than the diameter of the probe is drilled in the skull.
- the probe part is inserted into the perforated hole thus drilled, and the tip of the probe part is inserted into the brain or inserted into the brain groove.
- the insertion or insertion position may be determined in advance by X-ray photography or the like. Further, the depth of insertion into the brain can be adjusted by the length of the probe portion, and can be inserted to the deep portion of the brain or into the brain surface (for example, cerebral cortex) as necessary. In any case, the probe portion is pushed into the brain until the head portion contacts the skull, and the scalp is returned and sutured so as to cover the head portion as necessary.
- the extracorporeal measurement unit is installed outside the subject, usually close to the scalp where the head unit is located.
- the electrode of the probe part captures a weak electrical signal (typically an electroencephalogram) emitted by the surrounding brain, and The provided signal transmission unit transmits this signal wirelessly.
- This signal passes through the scalp and is received by an extracorporeal measurement unit installed outside the scalp to reproduce the electrical signal emitted by the brain.
- an electrical signal in the deep part of the brain for example, action potential of nerve tissue
- the cortical field potential in the brain can be detected by adopting a structure in which the electrode is exposed in a wide range of the peripheral surface of the probe portion.
- the signal transmission unit can be configured to perform signal transmission utilizing re-radiation from the head unit housing. According to this configuration, since it is not necessary to provide an electric circuit for signal transmission in the head portion, the configuration and structure are simple and low-cost, and failure and the like are unlikely to occur. In addition, since there is no electrical circuit in the body, the risk to the subject in the event of a failure or breakage of the body mounting portion can be reduced.
- the signal transmission unit includes a conversion processing unit that converts an electrical signal captured by the electrode into a predetermined format, and an antenna that radiates the converted signal. It can also be set as the structure containing these.
- an electric circuit is built in the head portion, and an electric signal such as an electroencephalogram obtained by the electrode is wirelessly transmitted to the outside by the operation of the electric circuit.
- the conversion processing unit includes a modulation unit that performs modulation so as to be suitable for radio wave transmission through an antenna. Further, when the electrical signal obtained from the electrodes is digitized and transmitted, an analog / digital conversion unit or the like may be included. According to this configuration, when information is transmitted from the in-body wearing part to the in-vitro measuring part, it is less susceptible to noise and the like, which is advantageous for measuring with higher sensitivity and higher resolution.
- the extracorporeal measurement unit can be installed at a certain distance from the scalp, and the degree of freedom of installation is increased. As a result, the degree of freedom of action of the subject increases.
- the head unit In the case of the second mode, driving power for driving the electric circuit built in the head portion is required.
- a battery may be built in the head unit, but considering the weight reduction and long-term use of the head unit, the head unit has a power supply unit that generates electric power by receiving radio waves emitted from the extracorporeal measurement unit.
- the generated power is used as drive power for the signal transmission unit.
- This power transmission can utilize what is used for a passive IC tag (RFID).
- RFID passive IC tag
- the brain information measuring apparatus can perform not only electrical measurement such as electroencephalogram but also optical measurement corresponding to optical topography etc. simultaneously or in time division. That is, the intracerebral information measuring device according to the present invention is preferably configured such that the head unit has an optical opening, and the probe unit has a light guide path optically coupled to the optical opening. Good.
- the extracorporeal measurement unit may include an irradiation unit that irradiates near-infrared light for optical topography measurement on the head unit of the in-vivo mounting unit mounted on the subject via the scalp of the subject. .
- near-infrared light when near-infrared light is irradiated to the scalp from the outside of the scalp by the irradiation unit of the extracorporeal measurement unit, the light passes through the scalp and is taken into the optical opening of the head unit located immediately below the scalp. Then, the light reaches the brain through the light guide and irradiates the brain with near infrared light.
- near-infrared light is emitted from the outside of the head, so that only reflected, scattered or passed light can be obtained near the brain surface.
- light can be irradiated particularly to the deep part of the brain.
- the light guide also has a function to receive light reflected, scattered or passed through the brain and guide it to the head. Therefore, the light received by the probe part of the internal mounting part provided at a certain distance apart from the internal mounting part used for the light irradiation described above is guided to the head part through the light guide path, and the optical part of the head part The light is emitted from the opening. Then, the light intensity may be measured by receiving this light through the scalp with, for example, an optical sensor provided in another extracorporeal measurement unit.
- the head unit may include a photoelectric conversion unit that receives light coming from the probe unit side through the light guide path and converts the light into an electric signal.
- a photoelectric conversion unit that receives light coming from the probe unit side through the light guide path and converts the light into an electric signal.
- the in-vivo mounting part serves as an electrical and optical access point for the deep part in the brain. Therefore, as described above, electrical information in the deep part of the brain can be extracted and optical information can also be extracted. Furthermore, conversely, electrical stimulation can be applied to the deep part of the brain using electrodes, or optical stimulation can be applied to the deep part of the brain through the light guide. By combining this, it is possible to acquire changes in the electroencephalogram when an optical stimulus is applied as electrical information, and conversely, acquire changes in the blood flow when an electrical stimulus is applied as optical information. You can also.
- the brain information measuring apparatus can achieve the following various effects.
- (1) When mounting the in-vivo mounting portion on the head of the subject, a simple surgical operation is sufficient because a small-diameter hole through which the probe portion can penetrate is formed in the skull. Therefore, it is easy to mount and it does not take time to mount, and the burden on the subject such as a patient or laboratory animal at the time of mounting can be greatly reduced. Thereby, the biological activity of the subject after wearing becomes smooth, and the stability and accuracy of measurement are improved.
- FIG. 1 is an external view showing a basic configuration of a brain information measuring apparatus according to an embodiment of the present invention.
- FIG. FIG. 3 is a schematic cross-sectional view showing an example of three typical forms of the probe unit 2.
- FIG. 8 is a schematic diagram illustrating an example of measurement using the in-vivo mounting unit and the external measurement unit illustrated in FIGS.
- FIG. 1 is an external view showing the basic configuration of the intracerebral information measuring apparatus of the present embodiment
- FIG. 2 is a schematic sectional view showing a state in which the intracerebral information measuring apparatus of the present embodiment is mounted on the head of a subject.
- the intracerebral information measuring apparatus includes a pointed and elongated probe portion 2 and a substantially disc-shaped head portion 3 having an outer diameter larger than the outer diameter of the probe portion 2.
- the in-vivo mounting part 1 and the extracorporeal measurement part 10 which is a separate body.
- the in-body mounting portion 1 has a thumbtack-like shape.
- the in-body mounting portions 1A and 1B have small-diameter holes that are slightly larger than the outer diameters of the probe portions 2A and 2B in the skull 102 with the scalp 101 of the subject's head 100 open.
- the probe portions 2A and 2B are inserted through the holes until the head portions 3A and 3B come into contact with the outside of the skull 102. After that, the head portion 3A, 3B is sandwiched between the scalp 101 and the skull 102 by covering the head portion 3A, 3B with the head portion 3A and sewing it.
- the probe portion 2A may be inserted into the cerebrum 104 directly at the tip of the cerebral cortex 103 or when the probe portion 2B is inserted into the cerebral groove 105.
- the extracorporeal measurement units 10A and 10B are generally arranged as close as possible to the outside of the head units 3A and 3B with the scalp 101 interposed therebetween, but may be arranged in a more distant place depending on circumstances. .
- FIG. 3 is a schematic cross-sectional view showing examples of three typical forms of the probe unit 2.
- FIG. 3A shows a uniaxial probe structure in which the entire probe portion 2 is an electrode 21 that is a conductor.
- the conductor is preferably made of a metal that does not easily corrode, and stainless steel or an alloy mainly made of stainless steel can be considered.
- the electrode 21 measures the cortical field potential in the vicinity of the inserted intracerebral region or in the vicinity of the inserted cerebral sulcus.
- FIG. 3B shows a uniaxial sheath probe structure in which a thin electrode 22 extending to the tip of the tip of the probe portion 2 is covered with a light guide portion 23 such as a transparent synthetic resin or quartz glass.
- the electrode 22 is exposed only at the tip, and measures the local potential in the inserted brain or in the deep part of the inserted sulcus.
- the light guide unit 23 is a kind of optical fiber that guides light (near infrared light) introduced from the head unit 3 to irradiate the inside of the brain or the sulcus, and from the inside of the brain or the sulcus.
- the reflected light, scattered light, transmitted light, etc. are received and sent to the head unit 3. Since the peripheral surface of the light guide unit 23 is exposed, a part of the light that passes through the light guide unit 23 and hits the inner peripheral surface at an angle smaller than the total reflection angle is transmitted outward and irradiates the surroundings. To do.
- FIG. 3C shows a biaxial probe structure in which an electrode 24, which is a cylindrical conductor, surrounds the light guide portion 23 of the uniaxial sheath probe structure. That is, the light guide portion 23 is filled between the central electrode 22 and the outer cylindrical electrode 24, and the outer electrode 24 is interrupted near the tip of the probe portion 2 so that the light guide portion 23 has a pointed shape. Exposed. Therefore, the light guided from the head unit 3 through the light guide unit 23 is emitted outward near the tip of the probe unit 2.
- the outer electrode 24 can measure the cortical field potential of the entire vicinity of the inserted intracerebral region or the entire vicinity of the inserted cerebral sulcus.
- the electrode 22 can measure the local potential in the inserted brain or deep in the inserted sulcus.
- the probe section 2 can be selected from either a needle-like rigidity or a flexible and appropriately bendable one. .
- the outer diameter of the probe portion 2 can be set to 100 to 500 ⁇ m.
- the length of the probe unit 2 can be appropriately determined according to the type of the subject, the depth of the region to be measured, and the like.
- FIG. 4 is a schematic cross-sectional view of the in-vivo mounting portion 1a using the single-axis sheath probe structure shown in FIG.
- this configuration is called a passive type in the sense that there is no active electric circuit inside the head portion 3.
- the head unit 3 has a hollow casing 31 made of metal (or other conductor), and the casing 31 and the electrode 22 are electrically connected.
- a substantially conical micro optical lens (corresponding to an optical opening in the present invention) 32 is provided in the housing 31, and the top side end of the micro optical lens 32 is connected to the light guide 23 of the probe unit 2. Optically connected, the bottom spherical surface portion is exposed outside the housing 31. As shown in FIG. 4, in a state where the in-body mounting portion 1 is disposed between the scalp 101 and the skull 102, the spherical portion of the micro optical lens 32 is in close contact with (or close to) the back surface of the scalp 101. .
- the electrode 22 of the probe part 2 inserted into the brain or inserted into the sulcus picks up the action potential of, for example, nerve tissue in the brain or deep part of the sulcus, and thereby causes electrical vibration. Is amplified by the re-radiation phenomenon of the casing 31 and is emitted as a weak electromagnetic wave.
- This electromagnetic wave passes through the scalp and is received by an extracorporeal measuring unit 10 (not shown) installed outside the scalp to reproduce an electrical signal.
- the extracorporeal measurement unit 10 be installed as close to the casing 31 as possible with the scalp 101 interposed therebetween.
- near-infrared light is irradiated from the extracorporeal measurement unit 10 to the scalp 101 as shown in FIG. It is sent. Then, the near infrared light is irradiated into the brain or the sulcus through the light guide 23. Reflected light, scattered light, and transmitted light in the brain and cerebral sulcus according to near-infrared light emitted from the probe part 2 of a certain in-body mounting part 1a are light guide parts of the probe part 2 of another in-body mounting part 1a. When the light enters the light 23, the light is guided to the micro optical lens 32 through the light guide 23, and the light is emitted to the outside through the scalp 101. Optical topography measurement can be performed by receiving this light by the extracorporeal measurement unit 10 and analyzing the intensity change in real time.
- FIG. 5 is a schematic cross-sectional view of the in-body mounting portion 1b having another configuration using the biaxial probe structure shown in FIG. 3 (c).
- this configuration is referred to as an active type in contrast to the passive type in the sense that an active electric circuit is provided inside the head unit 3.
- the head part 3 includes an electric circuit part 33, an antenna 34, and an optical sensor 36.
- the micro optical lens 32 returns from the probe part 2 side through the light guide part 23.
- a mirror 35 for reflecting the reflected light and introducing it into the optical sensor 36 is embedded.
- the electrodes 22, 24 and the optical sensor 36 are electrically connected to the electric circuit unit 33.
- FIG. 6 is a schematic block configuration diagram of the electric circuit unit 33.
- FIG. 7 is a schematic block diagram of the extracorporeal measuring unit 10 used corresponding to the in-vivo mounting unit 1b.
- the electrical circuit unit 33 includes a transmission / reception unit 331 including an antenna driving unit 332, a modulation unit 334, and a demodulation unit 333, a power supply unit 335, a control unit 336, a signal processing unit 337, and an ID storage unit 338.
- Each of the plurality of in-body mounting units 1 has unique identification information (ID), and the identification information is stored in advance in the ID storage unit 338.
- the extracorporeal measurement unit 10 includes a transmission / reception unit 12 including an antenna drive unit 13, a modulation unit 15, and a demodulation unit 14, a power supply unit 16, a control unit 17, and a signal processing unit 18.
- the power supply unit 16 drives the antenna 11 via the antenna drive unit 13 so as to radiate electromagnetic waves having a predetermined frequency from the antenna 11.
- the electric power supply unit 335 of the electric circuit unit 33 receives the electromagnetic wave via the antenna 34 to generate electric power, and supplies the electric power to each unit of the electric circuit unit 33. That is, the electric circuit unit 33 does not have a power source such as a battery, but has a circuit similar to a so-called passive IC tag that generates necessary power based on electromagnetic waves received from the outside via the antenna 34. ing.
- a battery may be built in the electric circuit unit 33, but it is disadvantageous for weight reduction and longer life.
- the control signal from the control unit 17 is modulated into a predetermined format (such as a frequency band suitable for radio wave transmission through the antennas 11 and 34) by the modulation unit 15, and is transmitted from the antenna 11 via the antenna driving unit 13. Sent out.
- the electric circuit unit 33 receives the above signal via the antenna 34 and demodulates it by the demodulating unit 333 to extract the original control signal, and the control unit 336 generates a signal processing unit 337 and an ID storage unit based on the control signal. 338 and the like are controlled.
- the ID read from the ID storage unit 338 is modulated into a predetermined format by the modulation unit 334 and sent from the antenna 34 via the antenna drive unit 332.
- the electrical signal picked up by the electrodes 22 and 24 and the electrical signal generated by photoelectric conversion by the optical sensor 36 are amplified by the signal processing unit 337, and multiplexing such as frequency multiplexing and time division multiplexing is performed as necessary. Is called. Then, the signal is modulated into a predetermined format by the modulation unit 334 and transmitted from the antenna 34 via the antenna driving unit 332.
- the radio wave transmitted from the in-body mounting unit 1 is received by the antenna 11 as described above, demodulated by the demodulation unit 14, processed by the signal processing unit 18, and the ID and each of the electrodes 22, 24.
- the electric signals obtained by the optical sensor 36 are separated and taken out.
- FIG. 8 is a schematic diagram showing an example of measurement using the in-body mounting part and the in-vitro measurement part shown in FIGS.
- the extracorporeal measurement unit 10A emits near-infrared light, and the light is taken into the head unit 3A of the in-body mounting unit 1A through the scalp 101 and guided into the brain through the light guide path in the probe unit 2A. Then, near-infrared light is irradiated into the brain from the vicinity of the tip of the probe unit 2A.
- the light is reflected and scattered in the brain and is transmitted while a part reaches the tip of the probe portion 2B of the in-body mounting portion 1B, is taken into the light guide, is sent to the head portion 3B, and is converted into an electric signal by the optical sensor 36. Is done. That is, this electrical signal includes information such as blood flow in the brain.
- the in-body mounting portions 1A and 1B capture electrical signals in the brain with the electrodes 22 and 24 of the probe portions 2A and 2B, respectively.
- the electrical signals in the brain captured by the electrodes 22 and 24 of the probe unit 2A of the in-body mounting unit 1A are transmitted as radio waves by the electric circuit unit 33 and the antenna 34 incorporated in the head unit 3A as described above, so that the extracorporeal measurement unit Received at 10A.
- the electrical signals in the brain captured by the electrodes 22 and 24 of the probe unit 2B of the body mounting unit 1B and the electrical signals generated by photoelectric conversion by the optical sensor 36 are incorporated in the head unit 3B as described above. Radio waves are transmitted by the electric circuit unit 33 and the antenna 34 and received by the extracorporeal measurement unit 10B. In this way, collection of electrical information such as brain waves and collection of optical information such as optical topography are performed in parallel.
- near-infrared light irradiated on the scalp 101 can be sent into the brain or deep in the sulcus.
- Conventional non-invasive optical topography measurement can only measure the brain surface, but according to this configuration, high-resolution optical topography measurement deep in the brain can be realized.
- an electric signal or the like can be amplified on the electric circuit portion 33 side, and noise mixed during transmission is removed by signal processing on the extracorporeal measurement portion side. Therefore, a high-quality signal can be obtained compared to the passive type shown in FIG. 4, which is advantageous in improving measurement sensitivity and resolution. Further, since both power transmission and signal transmission can be performed at a certain distance, it is not always necessary to provide the extracorporeal measurement unit 10 in the vicinity of the in-vivo mounting unit 1 as shown in FIG.
- the signals obtained by the electrodes 22 and 24 in the electric circuit unit 33 may be digitized and sent as digital data.
- each in-vivo mounting part can be identified by the ID, so only one in-vitro measurement unit is provided, and thus all in-vivo mounting parts are provided. It is also possible to control the mounting part and perform signal processing.
- in-vitro measuring units even when a plurality of in-vitro measuring units are provided, by configuring the in-vitro measuring units to communicate with each other, it is possible to perform measurement in cooperation with a plurality of in-vivo mounting units. For example, it is possible to perform measurement by shifting the time in a predetermined pattern for a large number of in-body mounting parts arranged so as to cover the entire brain, in addition to performing simultaneous measurement in all in-body mounting parts. In this way, by performing a measurement in which a plurality of in-body mounting portions are networked, a complicated and advanced measurement that cannot be achieved by a conventional device is possible.
- only one light guide path is provided in the probe portion of the in-vivo mounting portion.
- two light guide paths are provided in parallel (in this case, however, two light guide paths are provided).
- the incidence side and the emission side may be separated from each other (no interference of light passing therethrough). As a result, measurement corresponding to optical topography can be performed with one in-vivo mounting portion mounted on the subject.
- Modulation unit 335 ... Power supply unit 336 ; Control unit 337 ... Signal processing unit 338 ... ID storage unit 100 ... Head 101 ... Scalp 102 ; skull 103 ... cerebral cortex 104 ... cerebrum 105 ... sulcus
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Abstract
Description
さらに本発明の他の目的とするところは、脳の深部の電気的計測と光学的計測とを並行して行うことができる脳内情報計測装置を提供することにある。
a)被検体の頭蓋骨に穿孔された貫通孔を通して脳に刺入され又は脳溝に挿入され、少なくとも周囲の電気信号を捉える電極を有するプローブ部と、該プローブ部の端部に一体に設けられて被検体の頭蓋骨と頭皮との間に挟持され、少なくとも前記電極で捕捉された電気信号を無線で頭皮の外側に送出する信号送出部を有するヘッド部と、から成る体内装着部と、
b)被検体の頭皮の外側に設置され、その頭皮を通して前記ヘッド部の信号送出部から送出される信号を受信する体外計測部と、
を備えることを特徴としている。
(1)体内装着部を被検体の頭部に装着する際に、プローブ部が貫通可能な程度の細径の孔を頭蓋骨に穿設すればよいので、簡単な外科的手術で済む。したがって、装着が容易で装着に時間が掛からなくて済むだけでなく、装着時における患者や実験動物等の被検体に与える負担を大幅に軽減することができる。それにより、装着後の被検体の生体活動が円滑になり、計測の安定性、正確性が向上する。
(2)脳内には電気配線や回路などのハイリスク因子が存在せず、残されたリスク因子も頭蓋骨の外側に配設される。そのため、体内装着部に故障や破損が生じた場合でも、脳内組織に対する悪影響を最小限に留めることができる。
(4)体内装着部と体外計測部との間では無線による信号伝送が行われるため、被検体の行動の自由度が高く、そうした自由な行動の下での有意義な計測が可能となる。被検体の行動によっても体内装着部が外れることがなく、破損するおそれも少ないので、長期間の計測が可能である。
図3(a)は、プローブ部2の全体が導電体である電極21となっている1軸プローブ構造である。導電体は、腐食しにくい金属とすることが好ましく、ステンレス又はステンレスを主材とする合金などが考えられる。この電極21は、刺入された脳内部位付近全体又は挿入された脳溝付近全体の皮質フィールドポテンシャルを計測するものである。
2、2A、2B…プローブ部
3、3A、3B…ヘッド部
10、10A、10B…体外計測部
11、34…アンテナ
12…送受信部
13…アンテナ駆動部
14…復調部
15…変調部
16…電力供給部
17…制御部
18…信号処理部
21、22、24…電極
23…導光部
31…筐体
32…マイクロ光学レンズ
33…電気回路部
35…ミラー
36…光センサ
331…送受信部
332…アンテナ駆動部
333…復調部
334…変調部
335…電力供給部
336…制御部
337…信号処理部
338…ID記憶部
100…頭部
101…頭皮
102…頭蓋骨
103…大脳皮質
104…大脳
105…脳溝
Claims (7)
- 被検体の脳内の情報を収集する脳内情報計測装置であって、
a)被検体の頭蓋骨に穿孔された貫通孔を通して脳に刺入され又は脳溝に挿入され、少なくとも周囲の電気信号を捉える電極を有するプローブ部と、該プローブ部の端部に一体に設けられて被検体の頭蓋骨と頭皮との間に挟持され、少なくとも前記電極で捕捉された電気信号を無線で頭皮の外側に送出する信号送出部を有するヘッド部と、から成る体内装着部と、
b)被検体の頭皮の外側に設置され、その頭皮を通して前記ヘッド部の信号送出部から送出される信号を受信する体外計測部と、
を備えることを特徴とする脳内情報計測装置。 - 請求項1に記載の脳内情報計測装置であって、
前記信号送出部は、ヘッド部筐体からの再輻射を利用した信号送出を行うものであることを特徴とする脳内情報計測装置。 - 請求項1に記載の脳内情報計測装置であって、
前記信号送出部は、前記電極で捕捉された電気信号を所定の形式に変換する変換処理部と、変換された信号を放射するアンテナと、を含むことを特徴とする脳内情報計測装置。 - 請求項3に記載の脳内情報計測装置であって、
前記ヘッド部は、前記体外計測部から発せられる電波を受けて電力を生成する電力供給部を有し、生成した電力を前記信号送出部の駆動電力とすることを特徴とする脳内情報計測装置。 - 請求項1~4のいずれかに記載の脳内情報計測装置であって、
前記ヘッド部は光学的開口部を有し、前記プローブ部は前記光学的開口部と光学的に結合された導光路を有することを特徴とする脳内情報計測装置。 - 請求項5に記載の脳内情報計測装置であって、
前記体外計測部は、被検体の頭皮を介して該被検体に装着された体内装着部のヘッド部に、光トポグラフィ計測用の近赤外光を照射する照射部を有することを特徴とする脳内情報計測装置。 - 請求項5又は6に記載の脳内情報計測装置であって、
前記ヘッド部は、前記導光路を経てプローブ部側から到来した光を受光して電気信号に変換する光電変換部を有することを特徴とする脳内情報計測装置。
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WO2016204084A1 (ja) * | 2015-06-17 | 2016-12-22 | 国立大学法人東北大学 | 神経電極システム |
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WO2020095396A1 (ja) * | 2018-11-07 | 2020-05-14 | 特定非営利活動法人ニューロクリアティブ研究会 | 電極および信号測定装置 |
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Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040006264A1 (en) * | 2001-11-20 | 2004-01-08 | Mojarradi Mohammad M. | Neural prosthetic micro system |
US20040082875A1 (en) * | 2002-10-24 | 2004-04-29 | Brown University Research Foundation | Microstructured arrays for cortex interaction and related methods of manufacture and use |
US20050015128A1 (en) * | 2003-05-29 | 2005-01-20 | Rezai Ali R. | Excess lead retaining and management devices and methods of using same |
US20050113744A1 (en) * | 2003-11-21 | 2005-05-26 | Cyberkinetics, Inc. | Agent delivery systems and related methods under control of biological electrical signals |
US20050203366A1 (en) * | 2004-03-12 | 2005-09-15 | Donoghue John P. | Neurological event monitoring and therapy systems and related methods |
US20060009814A1 (en) * | 2004-07-07 | 2006-01-12 | Alfred E. Mann Foundation For Scientific Research | Brian implant device |
US20060167530A1 (en) * | 2005-01-06 | 2006-07-27 | Flaherty J C | Patient training routine for biological interface system |
JP2006230955A (ja) * | 2005-02-28 | 2006-09-07 | Tohoku Univ | 神経インプラント装置 |
US20060206172A1 (en) * | 2005-03-14 | 2006-09-14 | Dimauro Thomas M | Red light implant for treating Parkinson's Disease |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1684861B1 (en) * | 2003-10-21 | 2014-12-03 | The Regents Of The University Of Michigan | Intracranial neural interface system |
JP2007289224A (ja) | 2006-04-21 | 2007-11-08 | Hitachi Ltd | 生体計測装置および生体計測方法 |
-
2009
- 2009-09-25 WO PCT/JP2009/004877 patent/WO2010038393A1/ja active Application Filing
- 2009-09-25 JP JP2010531721A patent/JP5224482B2/ja active Active
- 2009-09-25 US US13/121,506 patent/US8874201B2/en active Active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040006264A1 (en) * | 2001-11-20 | 2004-01-08 | Mojarradi Mohammad M. | Neural prosthetic micro system |
US20040082875A1 (en) * | 2002-10-24 | 2004-04-29 | Brown University Research Foundation | Microstructured arrays for cortex interaction and related methods of manufacture and use |
US20050015128A1 (en) * | 2003-05-29 | 2005-01-20 | Rezai Ali R. | Excess lead retaining and management devices and methods of using same |
US20050113744A1 (en) * | 2003-11-21 | 2005-05-26 | Cyberkinetics, Inc. | Agent delivery systems and related methods under control of biological electrical signals |
US20050203366A1 (en) * | 2004-03-12 | 2005-09-15 | Donoghue John P. | Neurological event monitoring and therapy systems and related methods |
US20060009814A1 (en) * | 2004-07-07 | 2006-01-12 | Alfred E. Mann Foundation For Scientific Research | Brian implant device |
US20060167530A1 (en) * | 2005-01-06 | 2006-07-27 | Flaherty J C | Patient training routine for biological interface system |
JP2006230955A (ja) * | 2005-02-28 | 2006-09-07 | Tohoku Univ | 神経インプラント装置 |
US20060206172A1 (en) * | 2005-03-14 | 2006-09-14 | Dimauro Thomas M | Red light implant for treating Parkinson's Disease |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8774892B2 (en) | 2007-06-05 | 2014-07-08 | Med-El Elektromedizinische Geraete Gmbh | Electrode configuration and measuring device for measuring the electrical activity in electrically active tissue |
WO2011133490A1 (en) * | 2010-04-20 | 2011-10-27 | Med-Elektromedizinische Geraete Gmbh | Electrode configuration and measuring device for measuring the electrical activity in electrically active tissue |
JP2014079387A (ja) * | 2012-10-17 | 2014-05-08 | Nara Institute Of Schience And Technology | 脳機能計測装置及び計測方法 |
JP2016049342A (ja) * | 2014-09-01 | 2016-04-11 | 国立大学法人 奈良先端科学技術大学院大学 | 生体組織用イメージングデバイス及び生体組織用イメージング方法 |
TWI568421B (zh) * | 2015-01-23 | 2017-02-01 | Skull surgery device | |
TWI577348B (zh) * | 2015-01-23 | 2017-04-11 | Skull surgery positioning system | |
KR101645852B1 (ko) * | 2015-02-05 | 2016-08-04 | 한양대학교 산학협력단 | 나사형 전극 및 나사형 전극을 이용한 뇌파 측정 장치 및 방법 |
WO2016204084A1 (ja) * | 2015-06-17 | 2016-12-22 | 国立大学法人東北大学 | 神経電極システム |
JPWO2016204084A1 (ja) * | 2015-06-17 | 2018-04-26 | 国立大学法人東北大学 | 神経電極システム |
KR101798640B1 (ko) | 2016-08-31 | 2017-11-16 | 주식회사 유메딕스 | 뇌파 획득 장치 및 이를 이용한 행동 패턴 실험 장치 |
WO2020095396A1 (ja) * | 2018-11-07 | 2020-05-14 | 特定非営利活動法人ニューロクリアティブ研究会 | 電極および信号測定装置 |
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