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1982. Printed in U.S.A. WILLIAM M. MAGUIRE JOAN S. BAIZER State University of New York, Division of Neurobiology, Department of Physiology, Amherst, New York 14226 SUMMARY CONCLUSIONS 1. Single cells 17 of the alert rhesusmonkey were classified according to their sensitivity to variations in stimulus orientation, color, direction of movement. The sensitivity of the cells to stimulus was then tested using moving bars large stationary spots presented for 500 ms. The of the stimulus was varied over trials; background was kept constant. Short stimulus durations long intertrial intervals were chosen to minimize changes in light adaptation, thus compare responses to briey presented stimuli of different s at a constant mesopic adaptation level (0.15 ft-L). Moving bars were chosen so as to be of optimal orientation for orientation-specific cells. 2. Orientation-specific cells differ from cells without orientation specificity in the range of stimulus s over which they respond differentially. Generally, orientation-specific cells show response saturation at s 2-10 s the background . Cells without orientation specificity respond differentially over a larger range; some of these cells did not show response saturation within the range tested. 3. We conclude that under conditions of constant light adaptation, the of a brief
Journal of Neurophysiology – The American Physiological Society
Published: Jan 1, 1982
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