Effects of brain bisection on eye-hand coordination in monkeys wearing prisms.

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Abstract
TESTS OF IPSILATERAL AND CONTRALATERAL EYE-HAND PAIRS IN SPLIT-BRAIN MONKEYS ON NORMAL AND PRISM-ALTERED COORDINATION REVEALED LITTLE DEFICIT IN ACCURACY OR PRECISION OF REACHING, OR IN THE ABILITY TO ADAPT TO DISPLACED VISION OR TO TRANSFER ADAPTATION INTEROCULARLY WHEN SS USED IPSILATERAL EYE-HAND PAIRS. NEITHER NORMAL NOR SPLIT-BRAIN MONKEYS SHOWED INTERMANUAL TRANSFER OF ADAPTATION. SLIGHT DEFICITS IN NORMAL REACHING ABILITY WITH IPSILATERAL COMBINATIONS WERE SOMETIMES OBSERVED, PARTICULARLY IN ANIMALS WITH MIDLINE SECTION EXTENDING INTO THE MIDBRAIN OR CEREBELLUM. SOME TYPE OF BILATERAL INTEGRATION OR TRANSFER APPEARS NECESSARY IN THE BRAIN STEM OR BELOW. EFFECTS OF ADAPTATION TO WEDGE PRISMS ARE ASSOCIATED WITH CHANGES IN THE PROPRIOCEPTIVE-MOTOR MECHANISMS OF THE EXPOSED LIMB RATHER THAN WITH VISUAL PERCEPTION. (21 REF.) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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