Glutamate decarboxylase immunoreactivity in the intermediate grey layer of the superior colliculus in the cat.

Published

Journal Article

Recent evidence suggests that gamma-aminobutyrate has a profound influence on the activity of premotor neurons in the intermediate grey layer of the superior colliculus. In the present study an antibody to glutamate decarboxylase, the synthesizing enzyme for gamma-aminobutyrate, was used to identify and characterize the structures in the intermediate grey layer of the cat that use gamma-aminobutyrate as a transmitter. The material was examined with both the light and electron microscope. Glutamate decarboxylase immunoreactivity was confined, for the most part, to axon terminals. Glutamate decarboxylase positive terminals almost completely cover the soma and proximal dendrites of the large neurons that are characteristic of this layer. Other glutamate decarboxylase positive terminals contact smaller, presumably more distal dendrites. By combining the glutamate decarboxylase immunocytochemistry with the retrograde transport of horseradish peroxidase in single animals, it was demonstrated that the cells of origin of the major descending efferent pathway from the intermediate grey layer, the predorsal bundle, are heavily contacted by glutamate decarboxylase immunoreactive terminals.

Full Text

Duke Authors

Cited Authors

  • Lu, SM; Lin, CS; Behan, M; Cant, NB; Hall, WC

Published Date

  • September 1985

Published In

Volume / Issue

  • 16 / 1

Start / End Page

  • 123 - 131

PubMed ID

  • 3835498

Pubmed Central ID

  • 3835498

International Standard Serial Number (ISSN)

  • 0306-4522

Language

  • eng

Conference Location

  • United States