Abstract
On the basis of the result that the .lambda. response was associated with the offset of the saccade, EEG were averaged at the offsets of saccades to obtain the .lambda. responses under the following 4 conditions: in the dark, looking at a white paper, looking at a map and searching on the map. Six subjects [human] were permitted to move their eyes freely. The .lambda. response showed the tendency similar to the visual evoked potential. The offset averages enabled more accurate detection of the responses than did the onset averages in earlier studies. The .lambda. response might be applicable as a new index of research on visual activity with free eye movements.

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