2016 Volume 14 Issue 2 Pages 59-65
We investigated the influence of a long-term consecutive visual search (LTCVS) on a cerebral activity during visual search and spatial working memory (VSSWM).
Ten subjects performed VSSWM tasks before and after LTCVS tasks. As for the LTCVS and VSSWM, the Advanced Trail Making Test Random Task (ATMT Task R) and the Advanced Trail Making Test Fixed Task (ATMT Task F) was introduced respectively, in which a subject, using a computer mouse, clicked a circle with the numbers from 11 to 40 in serial order. Once a numbered target was clicked, it was to disappear and another circle with the clicked number plus 30 showed up at the same time. In the Task R all the circles were rearranged at random, while the circles were not rearranged in the Task F; 30 circles were on the screen at any time in both tasks. Each subject performed Task R 40 times and Task F 10 times. The performance time, the error frequency and the electroencephalogram power values of the 13-30 Hz (beta power) before and after the LTCVS are compared.
It was clarified that the performance of the Task F impaired and the beta power of F3 and F7 electrodes more significantly increased after the LTCVS than before the LTCVS. These results suggested that the LTCVS increased the activities of distraction and impaired the activities of the area.
