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Contrast induced zones as the basis of optomotor memory in the crab, Pachygrapsus

Wiersma, C. A. G. and Hirsh, Richard (1975) Contrast induced zones as the basis of optomotor memory in the crab, Pachygrapsus. Journal of Comparative Physiology A, 102 (3). pp. 173-188. ISSN 0340-7594. doi:10.1007/bf01464354.

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A theory that optomotor memory involves the formation of limited black- and white-sensitive zones within the retina is presented. These zones would be formed due to the presence of any black-white border within the visual field. They adjoin each border with a black-sensitive zone on its white side, and a white-sensitive one on its black side (Fig. 1). This theory is confirmed by experimental results indicating that 1) only black-white reverses occurring within 3 to 4.5° of a former border position affect the size of memory responses (Fig. 3, 7), 2) black-white reverses within zones result in memory responses even though the original borders have not been displaced, and 3) unless a black-white reversal occurs within some zone no response will occur, even though displacement of the originally present border is obvious (Fig. 7). The stimulating effect of making a black-sensitive zone black is greater than making a white-sensitive zone white (Fig. 5). From the results of these and previous experiments it is inferred that memory is peripherally located. Other physiological aspects of the process are also considered.

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Additional Information:© 1975 Springer. Received 30 June 1975.
Subject Keywords:Retina; Previous Experiment; Visual Field; Physiological Aspect; Memory Response
Issue or Number:3
Record Number:CaltechAUTHORS:20210317-100034540
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Official Citation:Wiersma, C.A.G., Hirsh, R. Contrast induced zones as the basis of optomotor memory in the crab,Pachygrapsus . J. Comp. Physiol. 102, 173–188 (1975).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108467
Deposited By: Tony Diaz
Deposited On:24 Mar 2021 20:11
Last Modified:24 Mar 2021 20:11

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