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September 1962

Neural Mechanisms in Visual Guidance of Limb Movement

Author Affiliations

Fellow in Physiology and Neurological Medicine, The Johns Hopkins School of Medicine (Dr. Myers); Hixon Professor of Psychobiology, California Institute of Technology (Dr. Sperry), and Associate Professor of Biology, George Williams College (Dr. McCurdy).; Department of Physiology and Division of Neurological Medicine, The Johns Hopkins School of Medicine and the Division of Biology, California Institute of Technology. The work was carried out in part while the senior author was associated with the Department of Neurophysiology of the Walter Reed Army Institute of Research.

Arch Neurol. 1962;7(3):195-202. doi:10.1001/archneur.1962.04210030033005

Limb movements may be coordinated and executed entirely in the absence of vision. Normally, however, visual impressions play an important role in directing motor response. Sometimes visual direction appears merely as a superimposition upon already established patterns of activity. In progression, obstacles or irregularities seen in the path may condition final placement of the limbs. At other times visual direction appears to enter more intimately to define the particulars of movements from their inception. Reaching out to grasp a glass of water or to seize a fleeting object requires a close correlation of vision with patterning of action.

Little is known of the neural organizations through which visual information may impinge upon motor mechanisms. In the absence of definite knowledge brain schemata have been proposed to suggest possible pathways and centers through which visuomotor coordination might occur. Most schemata have implied a transmission of visual information from the visual receptive

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