Efferent connections of the caudate nucleus in cats

Autor: L. A. Savos'kina, N. N. Oleshko, V. A. Maiskii
Rok vydání: 1976
Předmět:
Zdroj: Neurophysiology. 7:126-132
ISSN: 1573-9007
0090-2977
DOI: 10.1007/bf01062858
Popis: Structural and ultrastructural changes in the frontal areas of the cortex and in the region of the globus pallidus were investigated after local and extensive destruction of the caudate nucleus. It was shown by the Fink-Heimer method that after local injury to the caudate nucleus by means of electrodes implanted 2–16 months before electrolytic destruction, only a few degenerating fibers of medium and thin caliber were present. Extensive destruction of the caudate nucleus (without preimplantation of electrodes) was followed by massive degeneration of fibers of different caliber in the frontal area of the cortex. After local injury to the caudate nucleus numerous thin degenerating axons 0.5–0.6 µ in diameter and degenerating terminals were found in the region of the globus pallidus. Degenerative changes in the axo-dendritic and axo-somatic terminals followed the "dark" type of course. It is concluded that no considerable direct projections of neurons of the caudate nucleus are present in the cortex. Degenerating fibers of average caliber in frontal areas of the cortex after destruction of the caudate nucleus are evidently axons of thalamic neurons and not from cells of the damaged nucleus.
Databáze: OpenAIRE
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