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Scarab Genomics

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Science 9 September 1983:
Vol. 221. no. 4615, pp. 1076 - 1078
DOI: 10.1126/science.6879206
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Articles

Science, Vol 221, Issue 4615, 1076-1078
Copyright © 1983 by American Association for the Advancement of Science

articles

A cholinergic-sensitive channel in the cat visual system tuned to low spatial frequencies

TH Harding, RW Wiley, and AW Kirby

Visually evoked responses to counterphased gratings were recorded from the cat visual cortex before and after physostigmine administration. Physostigmine markedly reduced the responses to low spatial frequencies, but minimally affected the response to high frequencies. This effect is considered cholinergic since it could be reversed by atropine. These results support at least a two-channel model of spatial frequency responsivity.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)