[Cortical efferents in different areas of the cat orbitofrontal cortex]

The efferental relations of different parts of the cat orbitofrontal cortex with other parts of the neocortex are not equal. As to the distribution in different zones of the neocortex they differ in the quantitative and spatial characteristics. The number of efferents originating from the orbitofrontal cortex increases from the medial part of the proreal gyrus to its dorsolateral parts and anterior part of the orbital gyrus. Thus the frontal part of the orbital gyrus has the greatest number of the efferental relations with other parts of the neocortex including the projection visual cortex. The relations disclosed suggest that the cat has the "circles" between the orbitofrontal cortex, parietal cortex and limbic cortex, apparently consequent on the bilateral influences between the three structures.