BINOCULAR INTERACTIONS IN RAPID SACCADIC ADAPTATION

被引:15
作者
ALBANO, JE
MARRERO, JA
机构
[1] Center for Visual Science, University of Rochester, Rochester
关键词
SACCADIC PLASTICITY; ADAPTATION; MOTOR LEARNING; INTEROCULAR TRANSFER; VERGENCE;
D O I
10.1016/0042-6989(95)00079-T
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
An adaptive mechanism controls the strength of innervation to the two eyes independently. However, under some circumstances an adjustment in strength of innervation to one eye is generalized to the other. The coupling and uncoupling of the two eyes during saccadic motor learning was studied using the technique of intrasaccadic target displacements to provide a precise visual-motor error proportional to the commanded movement. Early adaptive changes (saccade plus fast vergence) were measured within the saccadic interval and late adaptive changes (vergence error) were measured after the saccadic interval, When one viewing eye was retrained using intrasaccadic displacements, saccadic amplitude changes generalized to the other nonviewing eye. Thus, rapid adaptive changes trained monocularly were transferred to the nonviewing eye. But when two eyes were viewing and an adaptive stimulus was provided to only one eye (binocular viewing-monocular training), adaptive changes also occurred in both eyes. Experiments described here suggest that the recalibration of the saccade occurs quickly as a conjugate adjustment of gain which is used to balance innervation to the two eyes. Thereafter, disconjugate mechanisms provide a further recalibration to each eye independently.
引用
收藏
页码:3439 / 3450
页数:12
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