Transcranial real-time alternating current stimulation device and current control method

Abstract

The invention discloses a transcranial real-time alternating current stimulation device and current control method, and belongs to the technical field of cognitive neuroscience. The alternating current stimulation device comprises an electrode plate and a controller. A circuit board in the controller is integrated with: a power supply circuit electrically connected with the electrode plate, and used for providing transcranial alternating current for regulating cerebral cortex neuron activity; a main control circuit used for controlling the magnitude of the output current of the power supply circuit, wherein the main control circuit comprises a control system consisting of a single chip microcomputer, a DAC conversion chip and an operational amplifier; and a protection circuit used for suppressing high-frequency noise signals in the circuit and controlling the output voltage of the power supply circuit not to exceed a threshold value. An alternating current signal with a stable peak value is provided through the power supply circuit, and the waveform, the mode and the frequency of an output signal are accurately adjusted through the main control circuit, so that the safety of a tested patient during electrical stimulation is ensured.

Description

technical field [0001] The invention relates to the technical field of cognitive neuroscience, in particular to a transcranial real-time AC stimulation device and a current control method. Background technique [0002] Transcranial alternating current stimulation (tACS) is a non-invasive technique that regulates the neural electrical activity of the brain at a specific frequency by passing a weak (peak-to-peak value of the alternating current signal <2mA) stable alternating current signal of a specific frequency. Compared with other non-invasive techniques, tACS has the characteristics of low production cost, low design complexity, safety and painlessness. tACS can increase the neural electrical activity of the corresponding frequency. Its principle is mainly to rely on the application of an external source of alternating electric field to entrain the endogenous brain rhythmic activity to make it consistent with the external source stimulation. The external source of the ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a transcranial real-time AC stimulation device in order to solve the problem that the above-mentioned transcranial AC stimulation is inconvenient to adjust the stimulation current, resulting in inaccurate test experiments and insufficient safety and reliability during operation, which is likely to bring harm to patients. And the current control method, it has the advantages of convenient adjustment of the transcranial alternating current stimulation current, more accurate individual testing, suppression of high-level noise signals and limiting the voltage not exceeding the threshold, and safer use

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