Auxiliary memory system based on transcranial direct current stimulation

Abstract

The invention provides an auxiliary memory system based on transcranial direct current stimulation. The system comprises an electrical stimulator, an acquisition device and a training device. The training device selects different memory load materials for different working memory sub-components, and designs three different modes of training. The acquisition device collects electroencephalogram information of a user in different training modes before and after electrical stimulation, and provides references for the electrode placement position, stimulation duration and current density of the electrical stimulation instrument through comparison and statistics. The electrical stimulator activates the corresponding brain area to the maximum extent, and the effect of working memory is improved in cooperation with training in different modes. After the electrical stimulation is finished, the training without electrical stimulation is carried out again, and the improvement effect brought by the electrical stimulation can be extended to the position after the electrical stimulation is removed.

Description

technical field [0001] The invention belongs to the field of pattern recognition and relates to an auxiliary memory system based on transcranial direct current stimulation, in particular to an auxiliary memory system combining transcranial direct current stimulation with n-back working memory paradigm training. Background technique [0002] Transcranial direct current stimulation (tDCS), as a non-invasive technique to regulate the activity of the cerebral cortex, regulates the activity of neurons by applying a weak and stable direct current on the surface of the scalp. Transcranial direct current stimulation has two electrodes, namely the stimulating electrode and the reference electrode. According to the polarity of the stimulating electrode, it can be divided into: anodal stimulation, cathodal stimulation and sham stimulation. The current intensity is generally set at 1-2mA, and the duration is 5 ~20min range. Different from other non-invasive stimulation methods that use...

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Problems solved by technology

[0004] In 2005, Fregni first found that anodal tDCS applied to the left dorsolateral prefrontal cortex can improve working memory performance. In addition, studies have also shown that the effect of anodal stimulation is related to the difficulty of working memory tasks, and the use of anodal tDCS for working memory training brings The positive effect can be transferred to similar unfamiliar training tasks, but some studies have also shown that the improvement effect of anodal stimulation on working memory only stays during the stimulation process and cannot be extended after the completion of the stimulation

These research results show that the use of transcranial direct current stimulation has a positive effect on the enhancement of working memory, but there is no reasonable stimulation position and intensity, and with the training method, the memory effect is not good after being separated from the stimulation

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