Organization of the Projections of the Substructures of the Deep Mesencephalic Nucleus to the Striatum in the Dog Brain

摘要

The organization of the projections of substructures of the complex of the deep mesencephalic nucleus to functionally diverse areas of striatal structures in the dog brain (n = 20) were studied by retrograde axon transport of horseradish peroxidase. The ventrolateral segment of the caudate nucleus and the ventral segment of the putamen were found to receive projection fibers from neurons in the deep mesencephalic nucleus. The dorsal segment of the putamen received fibers from neurons in the cuneiform nucleus, while the lateral segment of the nucleus accumbens received fibers from neurons in the subcuneiform nucleus. The possible pathways of conduction of functionally diverse information and its integration in the projection systems studied here are discussed.