Visual Neuroscience

Research Article

Duplicity theory and ground squirrels: Linkages between photoreceptors and visual function

Gerald H. Jacobsa1

a1 Department of Psychology, University of California, Santa Barbara

Abstract

The presence of rod and cone photorceptors has traditionally been linked to well-defined classes of visual capacity by the generalization known as duplicity theory. This paper summarizes results obtained from studies of vision and the visual system in ground squirrels (Spermophilus sp.) that reveal instances where structure/function linkages depart from expectations based in duplicity theory. The details of these exceptions are reviewed and their possible mechanisms discussed.

(Received February 28 1990)

(Accepted June 06 1990)

Footnotes

Reprint requests to: Gerald H. Jacobs, Department of Psychology, University of California, Santa Barbara, CA 93106, USA.