Alpha asymmetry as a function of cognitive mode: the role of lateral eye movements

When monitored concurrently, the spontaneous lateral eye movements and alpha asymmetry associated with mental activity were themselves interrelated. Left eye movements were associated with a decrease in the ratio of right to left hemisphere alpha, while right eye movements resulted in an increase in this ratio, independent of cognitive task. The results were interpreted as evidence for a direct effect of oculomotor activity on alpha asymmetry.