Effects of lesions of the cerebellar oculomotor vermis on eye movements in primate: binocular control.
The effects of lesions of the dorsal 'oculomotor' cerebellar vermis on binocular oculomotor functions in three monkeys were examined. Prominent findings included (1) a convergence bias during monocular fixation, i.e., an 'esodeviation' in the absence of disparity cues, (2) a loss of comitancy, i.e., alignment varies more with orbital position, (3) abnormal saccade yoking producing saccade disconjugacy, and (4) defects in prism-induced phoria adaptation. There was also a suggestion of a disturbance in the dynamic properties of disparity-induced vergence. These findings point to a role for the 'oculomotor' vermis in binocular aspects of the control of eye movements.
Takagi
Mineo
M
Divisions of Ophthalmology and Visual Science, Niigata University, Graduate School of Medical and Dental Sciences, CREST, Japan Science and Technology, Niigata, 951-8510, Japan.
Tamargo
Rafael
R
Zee
David S
DS
D000222:Adaptation, Physiological / Q000502:physiology; D000818:Animals; D002529:Cerebellar Nuclei / Q000502:physiology*; D003714:Denervation; D005133:Eye Movements / Q000502:physiology*; D000882:Haplorhini; D010469:Perceptual Distortion / Q000502:physiology; D013285:Strabismus / Q000503:physiopathology; D015348:Vision, Binocular / Q000502:physiology*