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Electrode for brain wave measurement

An electrode and brain wave technology, applied in the field of electrodes for brain wave measurement, can solve problems such as troublesome work

Inactive Publication Date: 2018-06-08
NITTA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conductive paste has the function of fixing the position of the measurement site in addition to reducing the contact resistance between the scalp and the electrode, but it is troublesome to remove it after measurement

Method used

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  • Electrode for brain wave measurement
  • Electrode for brain wave measurement
  • Electrode for brain wave measurement

Examples

Experimental program
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Effect test

Embodiment 1

[0086] In this example, electrodes for electroencephalogram measurement were produced by pasting CNT-coated paper on a comb-shaped substrate, and their electrical characteristics were investigated. CNT-coated paper consists of a fiber base material and a structure formed by attaching CNTs to the surface of the fiber base material. Therefore, in the electrode for electroencephalogram measurement of Example 1, a structure having a network structure in which a plurality of CNTs are connected to each other is exposed on the surface of the comb-shaped base material.

[0087]

[0088] CNTs are produced by a general thermal CVD method using iron as a catalyst. The CNTs separated and dispersed with mixed acid and ultrasonic waves were taken out, neutralized with ammonia water, and washed with pure water. Finally, it was dried in an oven to obtain powdered CNTs.

[0089] Powdered CNTs were dispersed in DMF to produce a CNT dispersion. The concentration of CNTs in the dispersion li...

Embodiment 2

[0104] In the present embodiment, an electroencephalogram measurement electrode composed of a conductive comb-shaped base material is produced, and its electrical characteristics are investigated. The conductive comb-shaped base material is a CNT kneaded product obtained by molding a mixed material in which CNTs are kneaded in an elastomer as a base material into a comb shape. Therefore, the electrode for electroencephalogram measurement of Example 2 has a network structure in which a plurality of CNTs are connected to each other in addition to the surface of the comb-shaped base material.

[0105]

[0106] Samples of CNT kneaded products containing different concentrations of CNT were produced, and the relationship between CNT concentration and volume impedance was investigated. When producing a sample, first, CNTs and a base material were melt-kneaded by a twin-screw extruder, thereby producing a CNT-kneaded strand with a diameter of 0.3 cm. As the CNTs, CNTs obtained by ...

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Abstract

An electrode (10) for brain wave measurement is provided with a comb-shaped base member (12), which comprises an elastic body, and a structure formed on the comb-shaped base member (12). The electrode(10) for brain wave measurement is characterized in that the comb-shaped base member (12) comprises a support part (14) and a comb teeth row (17), which comprises multiple comb teeth (16) projectingfrom the support part (14) in a row. The electrode (10) for brain wave measurement is further characterized in that the structure is formed on one side surface of the comb teeth (16) along the comb teeth row (17) and contains multiple nanocarbon members that form an interconnected network structure and are fixed to the comb-shaped base member (12).

Description

technical field [0001] The invention relates to an electrode for electroencephalogram measurement. Background technique [0002] Conventional electrodes for electroencephalogram measurement generally use a type in which a conductive paste is inserted between the subject's scalp and the electrodes. The conductive paste has the function of fixing the position of the measurement site in addition to reducing the contact resistance between the scalp and the electrodes, but it is troublesome to work because it needs to be removed after the measurement. [0003] Therefore, in recent years, an electrode (dry electrode) capable of ensuring low contact resistance without using a conductive paste has been developed. As dry electrodes, for example, a multi-pin dry electrode attached to a hair band (for example, Non-Patent Document 1) and a multi-pin dry electrode attached to a headgear (for example, Non-Patent Document 2) have been proposed. In these dry electrodes, the multiple pins ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0408A61B5/0478A61B5/0492A61B5/296
Inventor 森本梓奥井敬造
Owner NITTA CORP
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