Electrophysiological study of corticocaudate projections in cats.

Published

Journal Article

The potential waves evoked in the caudate nucleus (CN) of cats by stimulation of the cerebral neocortex were sterotactically recorded. The head and the body of the caudate nucleus were systematically explored. Stimulation of the ipsilateral sigmoid gyrus and the orbitofrontal cortex evoked waves with the largest amplitude in the CN. Smaller potentials were evoked from the ipsilateral ectosylvian and suprasylvian gyri and from the sigmoid gyrus on the contralateral side. Antidromic conduction from the caudate nucleus to the cortex demonstrated the directness of the corticocaudate pathway. By stimulating the white matter and by amking lesions, the corticocaudate pathway was shown to pass, in part, through the subcallosal fasciculus and, in part, through the internal capsule. Corticocaudate connections were shown to be separate from the fibers of the corticospinal tract. A staggered and extensively overlapping topographic progression of the corticocaudate projections was demonstrable along the antero-posterior axis, but was less evident in the medio-lateral direction. It was concluded that the intranuclear distribution of functional synaptic connections must be more profusely branched than was suspected from anatomical data.

Full Text

Duke Authors

Cited Authors

  • Blake, DJ; Zarzecki, P; Somjen, GG

Published Date

  • March 1, 1976

Published In

Volume / Issue

  • 7 / 2

Start / End Page

  • 143 - 156

PubMed ID

  • 1262869

Pubmed Central ID

  • 1262869

International Standard Serial Number (ISSN)

  • 0022-3034

Digital Object Identifier (DOI)

  • 10.1002/neu.480070207

Language

  • eng

Conference Location

  • United States