Hemispheric asymmetry for a visuo-spatial task in monkeys.

G W Jason; A Cowey; L Weiskrantz

doi:10.1016/0028-3932(84)90102-7

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Hemispheric asymmetry for a visuo-spatial task in monkeys.

G W Jason·A Cowey·L Weiskrantz

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Abstract

The hypothesis that hemispheric asymmetries for visuo-spatial ability exist in rhesus monkeys was tested using a task for which the right hemisphere is specialized in man. The task required discrimination between two squares, one containing a central dot and the other a dot displaced upwards from centre. The animals' thresholds were determined before and after left-sided (LH-lesion) or right-sided (RH-lesion) unilateral occipital lobectomy combined with splenial transection, and the percentage change in threshold calculated. The LH-lesion monkeys were all worse than the RH-lesion monkeys on this measure, indicating the existence of a functional asymmetry.

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Animals Corpus Callosum Discrimination Learning Dominance, Cerebral Form Perception Functional Laterality Macaca mulatta Male Occipital Lobe Orientation Pattern Recognition, Visual Psychomotor Performance Sensory Thresholds Space Perception Journal Article Research Support, Non-U.S. Gov't

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G W Jason, A Cowey, L Weiskrantz. 1984. Hemispheric asymmetry for a visuo-spatial task in monkeys.. https://doi.org/10.1016/0028-3932(84)90102-7

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