手指动作自动矫正的脑电特征

Automatic Correction of Finger Movement on Electroencephalography

摘要:

设计了一个手指运动自动矫正实验，受试者在实验中通过手指控制电脑屏幕图标，执行手部动作快速自动矫正，同时被采集脑电(EEG)信号.选用后顶叶皮层区的脑电电极数据，经过叠加分析等处理，最终获得手部动作自动矫正的事件相关电位（ERP）成份.结果表明：目标跳变引发的自动矫正动作电位，呈现出一种特殊的电位特征，即先于150 ms左右出现一负性脑波，后于320 ms左右出现一正性脑波.

关键词:手指动作自动矫正; 事件相关电位(ERP); 双步指向任务; 脑电(EEG)

Abstract:

An experiment of automatic correction of finger movement was designed. In the experiment, participants were asked to quickly point to a target’s position with right thumbstick controlling a handcursor on a screen and electroencephalography(EEG) signals were recorded as well. The relevant eventralated potenial(ERP) components were analyzed by trials data averaging. The results show that a negativity at 150 ms and a positivity at 320 ms were found in jump trials.

Key words:fingermovement automatic correction; eventrelated potential (ERP); doublestep reaching task; electroencephalography (EEG)