Abstract
MACKAY1 has made use of the phenomenon of simultaneous contrast to provide evidence for the existence in the human visual system of neural channels that are sensitive to the density of visual texture. Using the same phenomenon, we have provided comparable evidence for the existence of lateral interaction between channels sensitive to velocity. That such channels do exist is suggested by the preliminary psychophysical observations of Pantle and Sekuler2, who demonstrated a luminance threshold elevation for moving contours that is limited to a range of values around the velocity of the adapting contour.
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References
MacKay, D. M., Nature, 245, 159–161 (1973).
Pantle, A. J., and Sekuler, R. W., Vision Res., 8, 445–450 (1968).
Grusser, O.-J., and Grusser-Cornehls, U., in The Handbook of Sensory Physiology, (edit. by Jung, R.), 3 a, 333–429 (Springer, Berlin-Heidelberg-New York, 1973).
Blakemore, C., and Tobin, E. A., Expl Brain Res., 15, 439–440 (1972).
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WALKER, P., POWELL, D. Lateral interaction between neural channels sensitive to velocity in the human visual system. Nature 252, 732–733 (1974). https://doi.org/10.1038/252732a0
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DOI: https://doi.org/10.1038/252732a0
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