EEG analysis of children while concentrating on task - part II

EEGs of six children (seven years old) who practiced image training and rapid reading were measured during concentration on tasks. Alpha waves on the occipital region tended to become large while subjects tried to get contents of a book while they were blindfolded. At the same time the alpha waves on the frontal region also became large and the ratio of the alpha amplitude on the frontal region to the occipital region (Fp2/O2), as an indicator of concentration, became larger than that in the resting state. The frequency of the alpha waves became faster during an imaging task. The alpha ratios of the right to the left hemisphere (O2/O1) were small in the beginning of the imaging task and of the blind-reading; it was considered subjects used the right hemisphere, and afterwards the ratios became larger, because of linguistic reports of their images. Beta waves tended to appear on the left side while rapid reading in Japanese and on the right while rapid reading in English. As a whole, the increasing rate of concentration estimated by the alpha waves was not so clear, though the Fm theta which is usually considered to appear on deep concentration, was often observed on some subjects.