Transcranial direct current stimulation instrument

Abstract

The invention discloses a transcranial direct current stimulation instrument, which comprises a shell and surface electrodes, wherein a display screen and a key are arranged on the shell; a circuit board is arranged inside the shell; the surface electrodes are connected with the circuit board through a lead; a plurality of surface electrodes are included; each surface electrode comprises four cathode electrode plates and an anode electrode plate, wherein the anode electrode plate is arranged at the centre; the four cathode electrode plates are uniformly distributed around the anode electrode plate; the five electrode plates are round conductive rubber electrode plates; a fine sponge layer is arranged at the bottom surface of each electrode plate; the five electrode plates are arranged on a rubber pad at the same time, and the electrode plates are insulated with one another. The transcranial direct current stimulation instrument disclosed by the invention is rational in setting and convenient in use. Because the direction of the current is from an anode to a cathode, a stimulation focused at the centre and accurately positioned can be generated when an encephalic region is stimulated.

Description

technical field [0001] The invention relates to a medical device, in particular to a transcranial direct current stimulator. Background technique [0002] There are some deficiencies in the transcranial direct current stimulator tDCS instrument in the prior art: 1. The current is mainly distributed on the edge of the electrode sheet instead of focusing on the center, and at present, 5×7cm and 5×5cm electrode sheets are mostly used, so that they cannot be accurately Targeted to stimulate specific brain functional areas. 2. During stimulation, the physiological saline in the sponge pad may be too much or too little, which will cause inconsistency in resistance and unstable stimulation intensity. 3. When evaluating the application of tDCS in certain brain dysfunction, the treatment group continued to stimulate tDCS for 20-30 minutes, while the control group often stimulated for several seconds and then stopped stimulating. However, some patients in the treatment group will f...

AI Technical Summary

Problems solved by technology

[0002] There are some deficiencies in the transcranial direct current stimulator tDCS instrument in the prior art: 1. The current is mainly distributed on the edge of the electrode sheet instead of focusing on the center, and at present, 5×7cm and 5×5cm electrode sheets are mostly used, so that they cannot be accurately Targeted stimulation of specific brain functional areas

2. During stimulation, the physiological saline in the sponge pad may be too much or too little, which will cause inconsistency in resistance and unstable stimulation intensity

However, some patients in the treatment group will feel numbness, itching and other sensations when stimulated by tDCS, while patients in the control group will not have this feeling after a few seconds, which will lead to inconsistencies in the basic conditions of the research and the experimental results will be affected by subjectivity

That is, the so-called double-blind study did not achieve true double-blind

4. At present, the tDCS instrument only has a single pair of stimuli, that is, a positive electrode and a negative electrode

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