Saccadic adaptation in the horizontal and vertical directions in normal subjects

We studied the properties of adaptive gain control in the saccadic system and examined whether the adaptations in the horizontal direction transferred to those in the vertical direction, and vice versa, in 16 normal subjects. Eye movements were measured using search coil system. In the adaptive sess...

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Bibliographic Details
Published in:Auris, nasus, larynx nasus, larynx, 2003-02, Vol.30, p.41-45
Main Authors: Watanabe, Shoji, Ogino, Sadao, Nakamura, Tadashi, Koizuka, Izumi
Format: Article
Language:English
Subjects:
Adaptation
Adult
Attention
Electrodiagnosis - instrumentation
Electromagnetic Fields
Female
Human
Humans
Male
Orientation
Pattern Recognition, Visual
Saccade
Saccades
Signal Processing, Computer-Assisted
Transfer (Psychology)
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Summary:We studied the properties of adaptive gain control in the saccadic system and examined whether the adaptations in the horizontal direction transferred to those in the vertical direction, and vice versa, in 16 normal subjects. Eye movements were measured using search coil system. In the adaptive session, a target moved randomly in amplitude steps of 20° or 30°, with half of the subjects performing in the horizontal direction and the others in the vertical direction. The target eccentricity was changed by a constant percentage (70%) during each saccade aimed at the target. Gains were gradually decreased during the course of 120 repetitions, and then approached approximately 70%. Comparison was made of the accuracy (saccadic amplitude/first target step amplitude) of horizontal and vertical vectors of oblique saccades before and after the adaptation. After the horizontal adaptation, the accuracy of horizontal vectors decreased in the horizontal direction ( P
ISSN:0385-8146
1879-1476
DOI:10.1016/S0385-8146(02)00119-0