CN115153564B - A non-invasive ultra-high density EEG acquisition electrode - Google Patents
A non-invasive ultra-high density EEG acquisition electrode Download PDFInfo
- Publication number
- CN115153564B CN115153564B CN202210914567.4A CN202210914567A CN115153564B CN 115153564 B CN115153564 B CN 115153564B CN 202210914567 A CN202210914567 A CN 202210914567A CN 115153564 B CN115153564 B CN 115153564B
- Authority
- CN
- China
- Prior art keywords
- electrode
- insulating
- needle
- invasive
- hollow cylinder
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
- 238000013461 design Methods 0.000 abstract description 2
- 210000004556 brain Anatomy 0.000 description 21
- 210000003169 central nervous system Anatomy 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 210000004761 scalp Anatomy 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000007659 motor function Effects 0.000 description 3
- 229910021607 Silver chloride Inorganic materials 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000007943 implant Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000005036 nerve Anatomy 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000005013 brain tissue Anatomy 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000005057 finger movement Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 210000000337 motor cortex Anatomy 0.000 description 1
- 210000002569 neuron Anatomy 0.000 description 1
- 230000003961 neuronal insult Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 210000003625 skull Anatomy 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
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]
-
- 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
- A61B5/251—Means for maintaining electrode contact with the body
- A61B5/256—Wearable electrodes, e.g. having straps or bands
-
- 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
- A61B5/262—Needle electrodes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
本发明公开了一种非侵入式超高密度脑电采集电极，其结构包括空心圆柱电极装置（1）和针状电极装置（2），所述针状电极装置（2）套装在所述空心圆柱电极装置（1）上，所述针状电极装置（2）为相对所述空心圆柱电极装置（1）上下滑动的可拆卸组合结构。与现有技术相比，本发明极大地减小了非侵入式脑电采集电极的尺寸，可用于非侵入式超高密度BCI系统的设计，将电极间距减小至毫米级别，以提高非侵入式脑电信号的空间分辨率；同时提高了非侵入式超高密度脑电采集电极在使用时的稳定性和易用性。
The present invention discloses a non-invasive ultra-high density electroencephalogram (EEG) acquisition electrode, the structure of which comprises a hollow cylindrical electrode device (1) and a needle electrode device (2), wherein the needle electrode device (2) is mounted on the hollow cylindrical electrode device (1), and the needle electrode device (2) is a detachable combined structure that slides up and down relative to the hollow cylindrical electrode device (1). Compared with the prior art, the present invention greatly reduces the size of the non-invasive electroencephalogram (EEG) acquisition electrode, and can be used in the design of a non-invasive ultra-high density BCI system, reducing the electrode spacing to the millimeter level to improve the spatial resolution of the non-invasive electroencephalogram (EEG) signal; at the same time, the stability and ease of use of the non-invasive ultra-high density electroencephalogram (EEG) acquisition electrode when in use are improved.
Description
Technical Field
The invention relates to the technical field of brain-computer interfaces, in particular to a non-invasive brain electricity acquisition electrode.
Background
The Brain-machine interface (Brain-Computer Interface, BCI) is a system that alters the constant interaction between the CNS and its internal and external environment by detecting the activity of the central nervous system (Central Nervous System, CNS) and converting it into an artificial output to replace, repair, augment, supplement or improve the normal output of the CNS. Specifically, the BCI can not only establish a connection path from the human brain to external devices to replace, repair or improve a patient's impaired motor function due to injury, be used for peripheral control in a specific task environment, but also realize communication from the human brain to the machine to the human brain, thereby supplementing or enhancing man-machine interaction. The BCI technology research has the important significance that firstly, the capability of people for communicating information with the outside is greatly expanded, the revolution of the traditional human external communication and control mode or approach is possibly initiated, and secondly, the method is helpful for the deep understanding of the brain cognition mode, the information flow and the control mode, and opens up a brand-new research channel and method for reading the brain thinking model and the consciousness forming mechanism.
BCI systems are classified into invasive and non-invasive according to the manner in which the detection signal sensor is positioned. The electrode density of the invasive BCI system is extremely high and directly touches neurons, so that the attenuation of signals in the transmission process is avoided, the system has higher signal-to-noise ratio and good time, space and frequency resolution, and can realize fine motion control and complete more complex tasks in three-dimensional space and real time. However, the invasive BCI system requires a surgical operation to implant the electrode, which not only damages brain tissue, but also maintains long-term biocompatibility, which presents a great risk and technical difficulty, and thus, the application of the invasive BCI technology is limited. Furthermore, studies have shown that implantation of electrodes in the motor cortex of the brain causes neuronal damage and reduces motor function, mainly resulting in impaired fine motor function.
The non-invasive BCI system does not need to implant an electrode by operation, is easy to realize, safe and portable, and is the key point of the current research. However, when signals generated by the brain cortex nerve electric activity pass through tissue layers such as skull and reach the surface of scalp, serious attenuation occurs, and due to the existence of volume conductor effect, a great amount of space-time distribution information related to brain cortex nerve electric activity signal sources and high-frequency components of brain electricity are lost, so that the spatial resolution of non-invasive BCI brain electrical signals is lower, and effective extraction and accurate identification of finer action characteristics such as finger movement and the like are difficult to realize. Therefore, the research of the non-invasive BCI system needs to be further broken through, and the key point is how to effectively improve the spatial resolution of scalp electroencephalogram.
The current research shows that for the non-invasive BCI system, when the electrode spacing is low to millimeter level, the non-invasive brain electrical space sampling frequency can be improved, the high-frequency component of the brain electrical signal can be obtained, and the spatial resolution of the non-invasive brain electrical is improved. The electrode spacing of the traditional BCI system is more than 2-3 cm, and the high-density brain electrical electrode spacing can be as low as 1.4 cm, but still is difficult to reach millimeter level.
How to realize a novel non-invasive ultra-high density electroencephalogram acquisition electrode capable of improving the electrode density of a non-invasive BCI system is a technical problem to be solved in the invention.
Disclosure of Invention
In order to solve the problems that the existing non-invasive BCI system is low in electrode density and difficult to acquire high-frequency components and high-spatial resolution information of brain electrical signals, the invention provides a non-invasive ultra-high-density brain electrical acquisition electrode, and the spatial resolution of the non-invasive brain electrical signals is improved by constructing a non-invasive ultra-high-density brain-computer interface system, and the electrode distance can be reduced to millimeter level.
The technical scheme adopted by the invention for solving the problems is as follows:
the non-invasive ultra-high density electroencephalogram acquisition electrode comprises a hollow cylindrical electrode device 1 and a needle-shaped electrode device 2, wherein the needle-shaped electrode device 2 is sleeved on the hollow cylindrical electrode device 1, the needle-shaped electrode device 2 is of a detachable combined structure which slides up and down relative to the hollow cylindrical electrode device 1, and the non-invasive ultra-high density electroencephalogram acquisition electrode comprises:
The hollow cylindrical electrode device 1 further comprises a hollow cylindrical electrode 11 and a semitransparent insulating tube 12, wherein the hollow cylindrical electrode 11 is embedded in the inner cavity of the semitransparent insulating tube 12;
The needle electrode device 2 further comprises a needle electrode 21, a first insulating hollow cylinder 22, an insulating connecting assembly 23, a second insulating hollow cylinder 24 and an electrode wire 25, wherein the first insulating hollow cylinder 22 and the second insulating hollow cylinder 24 are respectively glued to two ends of the insulating connecting assembly 23, the bottom surfaces of the first insulating hollow cylinder 22 and the second insulating hollow cylinder 24 are parallel, the diameter of the first insulating hollow cylinder 22 is smaller than that of the second insulating hollow cylinder 24, one end of the needle electrode 21 is connected with the electrode wire 25 and glued to the inner cavity of the first insulating hollow cylinder 22, and the other end of the needle electrode 21 penetrates through the semitransparent insulating tube 12 in the inner cavity of the second insulating hollow cylinder 24 and is parallel to the hollow cylindrical electrode 11.
The needle electrode 21 has a hollow structure with a cross-sectional outer diameter of 1mm.
The total maximum outer diameter of the non-invasive ultra-high density electroencephalogram acquisition electrode is not more than 6mm.
Compared with the prior art, the invention has the following beneficial effects:
the invention greatly reduces the size of the non-invasive brain electrical acquisition electrode, can be used for the design of a non-invasive ultra-high density BCI system, reduces the electrode spacing to the millimeter level so as to improve the spatial resolution of the non-invasive brain electrical signal, and simultaneously improves the stability and usability of the non-invasive ultra-high density brain electrical acquisition electrode in use.
Drawings
FIG. 1 is a schematic front view of a non-invasive ultra-high density electroencephalogram acquisition electrode of the present invention;
FIG. 2 is a front cross-sectional view of a non-invasive ultra-high density electroencephalogram acquisition electrode of the present invention;
FIG. 3 is a schematic left view of a non-invasive ultra-high density electroencephalogram acquisition electrode of the present invention;
FIG. 4 is a left side view of a non-invasive ultra-high density electroencephalogram acquisition electrode according to the present invention;
FIG. 5 is a schematic diagram of the front view of the hollow cylindrical electrode device;
FIG. 6 is a schematic top view of a hollow cylindrical electrode assembly;
FIG. 7 is a schematic view showing the front view of the needle electrode device;
fig. 8 is a schematic view of the structure of the needle electrode device in left view.
Reference numerals:
1. a hollow cylindrical electrode device 11, a hollow cylindrical electrode 12 and a semitransparent insulating tube;
2. needle electrode device, 21, needle electrode, 22, first insulating hollow cylinder, 23, insulating coupling assembling, 24, second insulating hollow cylinder, 25, electrode wire.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings and examples.
The specific structure of the invention is described below with reference to fig. 1 to 8, wherein the invention comprises a hollow cylindrical electrode device 1 and a needle-shaped electrode device 2, wherein:
the hollow cylindrical electrode device 1 comprises a hollow cylindrical electrode 11 and a semitransparent insulating tube 12, wherein the hollow cylindrical electrode 11 is embedded in the inner cavity of the semitransparent insulating tube 12;
The needle electrode device 2 comprises a needle electrode 21, a first insulating hollow cylinder 22, an insulating connecting component 23, a second insulating hollow cylinder 24 and an electrode wire 25, wherein the outer wall of the first insulating hollow cylinder 22 is glued on the inner side of one end of the insulating connecting component 23, and the bottom surface of the other end of the insulating connecting component 23 is glued on the upper surface of the second insulating hollow cylinder 24. The bottom surfaces of the first insulating hollow cylinder 22 and the second insulating hollow cylinder 24 are parallel. The semitransparent insulating tube 12 is sleeved in the inner cavity of the second insulating hollow cylinder 24. One end of the needle-shaped electrode 21 is connected with the electrode wire 25 and is glued to the inner cavity of the first insulating hollow cylinder 22, and the other end of the needle-shaped electrode is suspended to pass through the semitransparent insulating tube 12 in the inner cavity of the second insulating hollow cylinder 24 and is arranged parallel to the hollow cylinder electrode 11.
The needle-shaped electrode device 2 is sleeved outside the hollow cylindrical electrode device 1 and penetrates through the inner cavity of the hollow cylindrical electrode device 1 in a suspending manner. The needle electrode device 2 can slide up and down to adjust the position of the needle electrode.
Further, the second insulating hollow cylinder 24 has an inner diameter equal to the outer diameter of the translucent insulating tube 12, and the needle electrode device 2 has slight resistance against sliding up and down with respect to the hollow cylindrical electrode device 1.
Further, the hollow cylindrical electrode 11 is made of Ag/AgCl material.
Further, the needle electrode 21 is made of Ag/AgCl material and is hollow, and the outer diameter of the cross section is not more than 1mm;
Further, the outer diameter of the first insulating hollow cylinder 22 is smaller than the inner diameter of the second insulating hollow cylinder 24.
Furthermore, the maximum outer diameter of the integral structure of the non-invasive ultra-high density electroencephalogram acquisition electrode is not more than 6mm.
The needle electrode device and the hollow cylindrical electrode device are combined and can slide relatively, the needle electrode is adjusted to be fully contacted with the scalp of a user, so that stability is improved, stable electroencephalogram signals are facilitated to be obtained, the contact area between the conductive paste and the scalp of the user and between the conductive paste and the needle electrode is fully increased, stability is further improved, signal to noise ratio of the electroencephalogram signals is facilitated to be improved, the diameter of a first insulating hollow cylinder in the needle electrode device is smaller than that of a second insulating hollow cylinder, and the needle electrode device is convenient to inject the conductive paste, so that usability of the needle electrode device is improved.
The process for realizing the electroencephalogram acquisition by using the non-invasive ultra-high density electroencephalogram acquisition electrode comprises the following steps:
The hollow cylindrical electrode device 1 is fixed on an electroencephalogram cap, the needle-shaped electrode device 2 is sleeved on the hollow cylindrical electrode device 1, the lower end of the needle-shaped electrode 21 of the needle-shaped electrode device 2 is fully contacted with the scalp of a user through sliding adjustment, and the other end of the electrode wire 25 is connected with an electroencephalogram amplifier to collect electroencephalogram signals.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210914567.4A CN115153564B (en) | 2022-08-01 | 2022-08-01 | A non-invasive ultra-high density EEG acquisition electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210914567.4A CN115153564B (en) | 2022-08-01 | 2022-08-01 | A non-invasive ultra-high density EEG acquisition electrode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115153564A CN115153564A (en) | 2022-10-11 |
| CN115153564B true CN115153564B (en) | 2025-02-14 |
Family
ID=83477732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210914567.4A Active CN115153564B (en) | 2022-08-01 | 2022-08-01 | A non-invasive ultra-high density EEG acquisition electrode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115153564B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116212230A (en) * | 2023-03-14 | 2023-06-06 | 深圳中科华意科技有限公司 | A high-precision nerve electrical stimulation device and its control method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107595283A (en) * | 2017-09-28 | 2018-01-19 | 中国科学院电子学研究所 | Separate type brain electrical dry electrode |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009134763A1 (en) * | 2008-04-29 | 2009-11-05 | Board of Governors for Higher Education, State of Rhode Island and the Providence Plantations | Biomedical sensors usable on un-prepared contact surfaces |
| KR101552269B1 (en) * | 2013-09-30 | 2015-09-10 | 조선대학교산학협력단 | Non-invasive active dry electrode and electrode module having the electrode for wireless brain-to-computer interfacing |
| CN105559778A (en) * | 2016-02-02 | 2016-05-11 | 上海交通大学 | Brain electrode for collecting brain electrical signals for long time and preparation method thereof |
| US10576268B2 (en) * | 2017-03-22 | 2020-03-03 | International Business Machines Corporation | High resolution brain-electronics interface |
| CN107007280A (en) * | 2017-05-02 | 2017-08-04 | 臧大维 | A kind of ultra micro scalp electrode array |
| CN109893129B (en) * | 2019-04-10 | 2020-05-05 | 北京航空航天大学 | Dry electrode for adjusting depth by utilizing air bag and wearable electroencephalogram detection device |
| JP2023550878A (en) * | 2020-10-13 | 2023-12-06 | インペリアル・カレッジ・イノベーションズ・リミテッド | Intraoperative real-time tumor tissue identification device and method |
| CN213606414U (en) * | 2020-10-26 | 2021-07-06 | 武汉星嘉源科技有限公司 | Dry electrode for electroencephalogram detection |
| TW202227015A (en) * | 2021-01-04 | 2022-07-16 | 國立中央大學 | Dry electroencephalographic (eeg) electrode |
| CN113080980A (en) * | 2021-04-06 | 2021-07-09 | 上海念通智能科技有限公司 | Adjustable electroencephalogram electrode module |
| CN114588534A (en) * | 2022-02-28 | 2022-06-07 | 复旦大学 | A non-invasive high-density multi-channel electrode array |
| CN114617561A (en) * | 2022-04-21 | 2022-06-14 | 侯永青 | Needle type dry electrode structure and wireless brain electric cap capable of disassembling electrode and adjusting lead |
-
2022
- 2022-08-01 CN CN202210914567.4A patent/CN115153564B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107595283A (en) * | 2017-09-28 | 2018-01-19 | 中国科学院电子学研究所 | Separate type brain electrical dry electrode |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115153564A (en) | 2022-10-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104473637B (en) | Electrode probe for detecting electroencephalogram and dry electrode unit applying electrode probe | |
| CN102323857B (en) | Brain-computer interface electrode cap based on elastic array | |
| CN102871657B (en) | System and method for collecting electroencephalogram signal on basis of impedance self-adaption | |
| CN105769182A (en) | Electroencephalogram signal wireless collecting system | |
| CN117098499A (en) | Brain wave measuring device | |
| CN101980106A (en) | A two-dimensional cursor control method and device for a brain-computer interface | |
| CN105943035B (en) | Full electromagnetic shielding self-aiming self-deploys scalp microelectrode | |
| CN107595283B (en) | Separate EEG dry electrode | |
| CN207693566U (en) | A kind of brain wave acquisition sensor | |
| CN113974637A (en) | Highly comfortable new elastic EEG dry electrode, EEG equipment and application system | |
| CN109124628A (en) | A kind of myoelectricity acquisition device based on flexible active electrode | |
| CN115153564B (en) | A non-invasive ultra-high density EEG acquisition electrode | |
| CN114617561A (en) | Needle type dry electrode structure and wireless brain electric cap capable of disassembling electrode and adjusting lead | |
| CN117752340A (en) | Portable brain signal acquisition device, acquisition method and acquisition circuit | |
| CN201067402Y (en) | Medical skin electrode device | |
| CN116392144B (en) | A brain signal acquisition system, method and medium | |
| CN112754485A (en) | Electroencephalogram electrode cap convenient to wear and store | |
| CN208511023U (en) | A kind of multifunctional human surface biological electrical signal collection electrode | |
| CN103690161A (en) | Wearable electroencephalogram sleeping quality evaluator | |
| CN213821440U (en) | A human body physiological electrical data fusion acquisition device | |
| CN106937868B (en) | Electroencephalogram and near infrared spectrum combined acquisition device applied to rat | |
| RU182738U1 (en) | Dry active electrode for neurocomputer interface | |
| CN116807482B (en) | Headphone-type EEG acquisition device | |
| CN220141666U (en) | A dry electrode for non-invasive brain-computer interface devices | |
| CN218279651U (en) | Novel electrode structure for collecting electroencephalogram signals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |