Electrophysiological Identification of a Visual Area in Shark Telencephalon

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Science  02 Nov 1973:
Vol. 182, Issue 4111, pp. 492-494
DOI: 10.1126/science.182.4111.492


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.