片眼被覆とサッケード

抄録

Six healthy young adults were selected to examine the influence of blindfolding one eye on the production of horizontal saccadic eye movements under a monocular lead. A saccade-evoking apparatus (Nagashima K-N 50) was used to induce random saccades. Standard electronystagmography with a time constant of 3.0 and a paper speed of 50 mm/sec was emplo. yed for the recording of eye movements. Two main characteristic findings were obtained with both eyes open: the volocity of the saccades increased in proportion as the amplitude of the saccade rose, and the velocity of adduction was significantly faster than that of abduction.
Under unilateral blindfolding, the saccades towards the blindfolded eye showed no difference of velocity between adduction and abduction and no significantly increased velocity although the amplitude increased. However no significant change was noted in saccades towards the non-blindfolded eye. The neural pathways responsible for this finding are considered.