The latest research progress of tDCS technology security, improving learning ability and cognitive ability

Compared with other neuromodulation methods, tDCS technology has the characteristics of controllable cost, portability, safety, and ease of use, so it has considerable potentia.

【Safety Research】

During tDCS intervention, the current from the anode to the cathode electrode generates a weak electric field (EF<1V/m) throughout the cerebral cortex, the anode usually enhances the excitability of local neurons, and the cathode inhibits the excitability of local neurons, reaching The purpose of regulating brain functio.

The electric field generated by tDCS is generally considered to be a subthreshold stimulus, which means that tDCS itself does not cause neuronal depolarization and does not induce action potential.

As shown in the picture: the current density exceeds the threshold, and the pulse pattern brings EEG spikes and induces the risk of epilepsy

According to the research of the National Institutes of Health (NIH), it is considered that under the condition of using suitable electrodes and conductive paste, the current density is 246A/m² and the duration is less than 20 minutes, which is a safe rang.

According to the simulation results, taking 1mA current intensity as an example, the study found that the maximum current density is only 13A/m², which is only 1/200 of the safety standard given by NI.

【Improve your learning ability】

Studies have shown that continuous use of tDCS intervention can improve working memory performance, and working memory is closely related to a person's learning abilit.

From the analysis of brain physiological function and physiological characteristics, this is because the sequelae effect of tDCS can affect the change of calcium ion concentration, regulate the release and distribution of a variety of neurotransmitters, directly or indirectly change synaptic plasticity, so that in synapse play an important role in the regulation of touch replasticit.

【Improvement of cognitive ability】

The study found that tDCS intervening in a certain node of the neural network can have an impact on the entire neural networ.

Functional magnetic resonance imaging (fMRI) showed that after tDCS intervention, the synchrony of the negative correlation network (AN) increased, the synchrony of the default mode network (DMN) decreased, and the synchrony of the default mode network (DMN) decreased , which promotes the reallocation of brain resources, which may reveal the mechanism by which tDCS improves cognitive functio.

【Analysis conclusion】

As a rapidly developing technology, tDCS has bright development prospects in improving learning ability and cognitive abilit.

【references】

Wang Yang, Cheng Jiayue, Wang Zhe.