Vol. 54 No. 4 (1994), Articles
Vol. 54 No. 4 (1994)

Cortical area in the rat that mediates visual pattern discrimination

Articles
Published 1994-12-31
Gitta Wörtwein
Department of Medical Physiology, Panum Institute, University of Copenhagen, School of Medicine, Copenhagen; , Laboratory of Neuropsychiatry, Department of Pharmacology, University of Copenhagen, Rigshospitalet, Copenhagen, Denmark
Jesper Mogensen
Department of Medical Physiology, Panum Institute, University of Copenhagen, School of Medicine, Copenhagen; , Laboratory of Neuropsychiatry, Department of Pharmacology, University of Copenhagen, Rigshospitalet, Copenhagen, Denmark
Gregg Williams
Department of Medical Physiology, Panum Institute, University of Copenhagen, School of Medicine, Copenhagen;
Juan Carlos
Department of Medical Physiology, Panum Institute, University of Copenhagen, School of Medicine, Copenhagen;
Ivan Divac
Department of Medical Physiology, Panum Institute, University of Copenhagen, School of Medicine, Copenhagen;

Abstract

In Experiment I, bilateral ablations of the caudolateral cortex involving Krieg's area 36 impaired discrimination of visual patterns but not delayed alternation. In Experiment II, the same type of lesions retarded postoperative learning to discriminate embedded visual patterns. In rats from the Experiment II tracers of axonal transport gave no signs of damage of the connections of the primary visual cortex. In agreement with this, Nissl stain of the dorsal lateral geniculate nuclei showed no neuronal loss or gliosis. These results suggest that caudo-lateral cortex in rats corresponds to the inferotemporal cortex of primates.
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Copyright (c) 1994 Acta Neurobiologiae Experimentalis

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