THE maze test is a complex cognitive task involving visuoperceptual, p
lanning and foresight abilities. EEGs were recorded from 20 healthy su
bjects according to the 10/20 system. Coherence is analogous to a corr
elation coefficient between the signals recorded by two electrodes and
is computed between each electrode paired to all other electrodes. Th
e maze test provoked changes of coherence mainly within the prefrontal
regions, between parietal and central electrodes paired with frontal
electrodes, especially the right frontopolar and the left prefrontal e
lectrodes, and in the posterior temporal, parietal and occipital regio
ns. EEG coherence analysis detects changes in regions known to be invo
lved in visual processing and executive functions.