大腦在不同狀態下的專注度造成之P300變化研究

A Study of P300 Variations Induced by the Concentration of the Brain in Different Situation

腦機介面（Brain computer interface, BCI）發展日益蓬勃，BCI被廣泛應用在復健，應用大腦專注產生的P300進行復健遊戲介面的操作，P300為事件相關電位（Event-related potential, ERP）的一部分，P300為大腦注意刺激的其中一種指標性ERP波形，特徵為在200～400ms接近300ms的位置會出現一個明顯的正向ERP波形，因為是專注產生的波形因而被廣泛應用在BCI的控制。本次研究主要以不同程度的專注度觀察P300的變化，實驗分為四個階段：計數、按鍵任務、困難按鍵任務與按鍵任務加入背景音樂，其結果分為三種比較方向：計數與按鍵的差異、圖片刺激辨識難度變化與按鍵任務加入背景音樂的不同反應。藉由這些方向我們整理出大腦在何種狀況下會產生較大的專注負擔，也與大中的生活習慣相對應，找出那些習慣會使大腦的辦事效率降低，或在何種狀況下大腦呈現緊張的壓力狀態。

The brain computer interface (BCI) is developing increasingly vigorously. It is widely used in rehabilitation. The attention index, P300, is used to perform the operation of the rehabilitation game interface. The P300 is the event-related potential (ERP). It is characterized by a significant forward ERP waveform between from 200 and 400ms and appears at around 300ms. It is an attention waveform, and it is widely used in BCI control. The purpose of this study is to observe the changes of P300 in different degrees of concentration. The experiment is divided into four stages: counting tasks, button tasks, difficult button tasks and button tasks added background music. The results are divided into three comparison directions: the difference of counting and button, the difficulty of picture recognition, and the different response of the button tasks and button tasks adding background music. The study would find the situations under which the brain will generate a greater concentration, and find out which life habits would make the brain's work efficiency decrease or under what conditions the brain shows a stressful state.