Computerized EEG mapping during cognitive activation with verbal task

ABSTRACT

This study aimed to investigate the patterns of EEG reactivity during cognitive activation with word fluency test. Thirty-two healthy volunteers were investigated using brain mapping system during rest, with eyes closed and while performing the task. EEG maps showing the difference between the two conditions as well as off-line statistical analysis were performed. There was an involvement of the left hemisphere as shown by reactivity in the alpha b and frequency. Changes in the beta activity showed a different pattern, i.e. they were more localized than changes in the alpha activity, and took place mainly in the frontotemporal areas. The results were in accordance with neuropsychological findings. The implications of these findings to brain-mind research in normal subjects and psychiatric patients were discussed