221 39 39 1 1 Dr. H. J. Markowitsch M. Pritzel B. Petrović-Minić Department of Psychology University of Konstanz P. O. B. 5560 D-7750 Konstanz Federal Republic of Germany Institute of Psychology University of Düsseldorf D-4000 Düsseldorf Federal Republic of Germany Institute of Pathological Physiology, Medical Faculty University of Belgrade YU-11000 Belgrade Yugoslavia Summary Twenty-one cat brains with cortical injections of horseradish peroxidase resulting in labelled cells in the thalamic mediodorsal nucleus (MD) were screened for afferent projections from the parietal cortex. Contrary to expectation, nearly the whole prefrontal cortex (PFC) situated around the frontal pole was free of parietal afferents, while a small area in the anterior sylvian gyrus (orbito-insular subregion of PFC) consistently received afferents from the parietal cortex. The few afferents projecting to the cortex around the frontal pole originated exclusively from the convexity of the suprasylvian gyrus, while the great majority of the parietal neurons projecting to the anterior sylvian gyrus was situated within the fundus of the suprasylvian sulcus. While the main regions of the prefrontal cortex of the rhesus monkey receive a substantial projection from the parietal lobe, whereas the main regions of the cat's prefrontal cortex are free of afferents from the parietal cortex, possible differences in the parieto-prefrontal organization of both species are discussed. Furthermore, differences between the orbito-insular subregion and the rest of the PFC are emphasized.
Experimental Brain Research – Springer Journals
Published: Apr 1, 1980
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