THE ORGANIZATION OF DIENCEPHALIC ZONA INCERTA PROJECTIONS TO THE STRUCTURES OF THE PALLIDUM IN DOG BRAIN

Abstract

The detailed organization of the projections of the individual sectors of the zona incerta of the diencephalon to the functionally diverse pallidal structures in dog brain was investigated by the method of antero- and retrograde axonal transport of horseradish peroxidase. It was found that the neurons of the caudal incertal sector innervated the globus pallidus and the nucleus entopeduncularis which predominantly received the innervation from the motor structures. The projections from single neurons of the dorsal and ventral incertal sectors are directed to the same pallidal structures. No connections of the zona incerta with the limbic ventral pallidum were established.

Keywords

brain / zona incerta / globus pallidus / nucleus entopeduncularis / ventral pallidum

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