[Efferent connections of various parts of the orbitofrontal cortex with thalamic structures in cats].

By means of impregnation methods of Fink-Heimer and Kawamura-Niimi in 29 cats after unilateral extirpation of various parts of the orbitofrontal cortex (middle part, superior and inferior areas of the dorsolateral part of the proreal gyrus, anterior area of the orbital gyrus) connections with various groups of the thalamic nuclei have been studied. Essential differences have been revealed in projections of various parts of the orbitofrontal cortex to specific, nonspecific, associative and limbic nuclei of the thalamus. The most distributed system of the subcortical projections has the orbital gyrus cortex.

[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.