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Science 2 November 1973:
Vol. 182. no. 4111, pp. 492 - 494
DOI: 10.1126/science.182.4111.492
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Articles

Electrophysiological Identification of a Visual Area in Shark Telencephalon

David H. Cohen 1, Thomas A. Duff 2, and Sven O. E. Ebbesson 2

1 Department of Physiology, University of Virginia Medical School, Charlottesville 22901
2 Departmnent of Neurosurgery, University of Virginia Hospital, Charlottesville 22901

Optic nerve stimulation in the shark evokes short-latency telencephalic field potentials localized to the ipsilateral, posterior central nucleus. Such a well-defined visual area in elasmobranch telencephalon further challenges classical formulations of forebrain evolution. Moreover, its ipsilateral representation confirms recent evidence for a crossed thalamotelencephalic visual projection.


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