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Effect of adaptation level on maintained firing and sensitivity in receptive field center of X and Y cells

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Summary

Maintained firing rates of X cells and Y cells were compared at 6 adaptation levels (AL) between −2.71 log cd/m2 and 2.28 log cd/m2 (10 mm2 pupil size). X cell maintained firing was higher at all ALs and was statistically different at medium and high ones. Changes in AL had nearly identical effects upon X and Y cell suprathreshold sensitivity to a flashing spot in the center of their receptive fields; the Weber function had a slope of 0.744 for Y cells and 0.743 for X cells. These values are not statistically different.

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Authors and Affiliations

  1. Psychology Department, University of Miami, P. O. Box 248185, 33124, Coral Gables, Florida, USA

    J. G. Pollack & R. W. Winters

Authors
  1. J. G. Pollack
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  2. R. W. Winters
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Additional information

This research is supported by Public Health Service grant no. EY 00701.

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Pollack, J.G., Winters, R.W. Effect of adaptation level on maintained firing and sensitivity in receptive field center of X and Y cells. Experientia 34, 80–81 (1978). https://doi.org/10.1007/BF01921914

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