Transcranial electric stimulation electrode capable of reducing edge current density of electrode

Abstract

The invention discloses a transcranial electric stimulation electrode capable of reducing edge current density of an electrode. The transcranial electric stimulation electrode is composed of columnarconductive materials and an insulation material, the columnar conductive materials are coaxially nested in the electrode from inside to outside, the columnar conductive materials of the same electrodeare isolated by the insulation material, and the heights of the columnar conductive materials are successively increased from inside to outside; the columnar conductive material of the innermost layer is in a solid column shape or a hollow column shape, and except the columnar conductive material of the innermost layer, other columnar conductive materials are in hollow column shapes. By changingthe heights of the columnar conductive materials of the inner and outer layers, impedance of channels where all points of the surfaces, making contact with the scalp, of the columnar conductive materials are located is adjusted to adapt to the columnar conductive materials, balance of the edge current density of the surfaces, making contact with the scalp, of all the columnar bodies is achieved, and the edge current density of the electrode-scalp contact surface is reduced. Therefore, side effects caused by too large edge current density are reduced, and a possible technical means is providedfor the higher stimulus current amplitude.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and more particularly relates to a transcranial electrical stimulation electrode that reduces the current density at the edge of the electrode. Background technique [0002] Transcranial Electrical Stimulation (tES) is a non-invasive nerve stimulation technology, which can be divided into: Transcranial Direct Current Stimulation (tDCS), Transcranial Alternating Current Stimulation (Transcranial Alternating Current Stimulation) , tACS), transcranial random noise stimulation (Transcranial Random Noise Stimulation, tRNS). The principle of transcranial electrical stimulation is to transmit a specific, low-intensity current (-2 to +2mA, more than 2mA is only used for scientific research) from the scalp to a specific brain area, and then generate an electric field of a specific amplitude in a specific area. Regulate neuronal potential, change brain neuron activity, regulate cortical excitabili...

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Problems solved by technology

[0004] In view of the defects of the prior art, the purpose of the present invention is to solve the technical problem of excessive current density at the edge of the electrode-scalp contact surface in the process of transcranial electrical stimulation in the prior art

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