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Unit Responses from Commissural Fibers of Optic Lobes of Fish

Mark, R. F. and Davidson, T. M. (1966) Unit Responses from Commissural Fibers of Optic Lobes of Fish. Science, 152 (3723). pp. 797-799. ISSN 0036-8075. doi:10.1126/science.152.3723.797.

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The paired optic lobes of teleost fish are connected by two commissures. One of these, the tectal commissure, was studied with metal microelectrodes. Fibers are rhythmically active for prolonged periods in the dark and respond to light by a decrease in the rate of discharge. There is a rebound acceleration when the light is turned of. Each fiber is influenced by light in one eye only, and there is no response when light is projected into the opposite eye. This behavior resembles the "off" response recorded from the optic lobes and the optic nerve of fish. Unlike most units from the visual pathways of lower animals, single commissural fibers do not seem to give any recognizable response to patterned input such as small light or dark objects or small light sources stationary or moving anywhere in the visual field, nor do they respond to a vertical black bar moved over a white background.

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Additional Information:© 1966 American Association for the Advancement of Science. Received 6 May 1966. We thank R. W. Sperry for facilities used in this research and for help with the manuscript; one of us (T.M.D.) is an NSF undergraduate research participant.
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Issue or Number:3723
Record Number:CaltechAUTHORS:20151209-131337938
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Official Citation:Unit Responses from Commissural Fibers of Optic Lobes of Fish R. F. Mark and T. M. Davidson Science 6 May 1966: 152 (3723), 797-799. [DOI:10.1126/science.152.3723.797]
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:62747
Deposited By: Tony Diaz
Deposited On:09 Dec 2015 22:04
Last Modified:10 Nov 2021 23:06

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