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The medial geniculate body of the tree shrew, Tupaia glis. II. Connections with the neocortex.

Publication ,  Journal Article
Oliver, DL; Hall, WC
Published in: J Comp Neurol
December 1, 1978

In this study the temporal cortex of the tree shrew was subdivided on the basis of cytoarchitectonic criteria, and the connections of each subdivision with the thalamus and midbrain were analyzed with retrograde and anterograde techniques. The results indicate that, with one exception, each subdivision of the medial geniculate body projects to a separate cortical area. The primary auditory cortex receives projections from the ventral nucleus. Surrounding the primary cortex are at least five additional cytoarchitectonically distinct areas which receive projections from the remaining medial geniculate subdivisions. The evidence suggests that there is very little overlap in the projections from each of these geniculate subdivisions. An exception is the projection of the caudal nucleus of the medial division. This subdivision apparently projects to most, if not all, of the cortical target of the medial geniculate body. Although the cortical projections of the caudal nucleus overlap those of the other medial geniculate subdivisions, the laminar distribution of its terminations in cortex is different. The caudal nucleus projects primarily to layer VI whereas the other subdivisions of the medial geniculate body project primarily to layer IV and the adjacent part of layer III. Anterograde techniques were also used to study the projections from the cortex back to the thalamus and to the midbrain. The projections to the thalamus precisely reciprocate the thalamocortical connections. The projections to the midbrain are to the same areas which the preceding study (Oliver and Hall, '78) showed give rise to ascending projections to the medial geniculate body. An exception is the central nucleus of the inferior colliculus which apparently does not receive a projection from the temporal cortex.

Duke Scholars

Published In

J Comp Neurol

DOI

ISSN

0021-9967

Publication Date

December 1, 1978

Volume

182

Issue

3

Start / End Page

459 / 493

Location

United States

Related Subject Headings

  • Tupaiidae
  • Temporal Lobe
  • Strepsirhini
  • Species Specificity
  • Neurology & Neurosurgery
  • Neural Pathways
  • Mesencephalon
  • Haplorhini
  • Geniculate Bodies
  • Cats
 

Citation

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ICMJE
MLA
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Oliver, D. L., & Hall, W. C. (1978). The medial geniculate body of the tree shrew, Tupaia glis. II. Connections with the neocortex. J Comp Neurol, 182(3), 459–493. https://doi.org/10.1002/cne.901820306
Oliver, D. L., and W. C. Hall. “The medial geniculate body of the tree shrew, Tupaia glis. II. Connections with the neocortex.J Comp Neurol 182, no. 3 (December 1, 1978): 459–93. https://doi.org/10.1002/cne.901820306.
Oliver DL, Hall WC. The medial geniculate body of the tree shrew, Tupaia glis. II. Connections with the neocortex. J Comp Neurol. 1978 Dec 1;182(3):459–93.
Oliver, D. L., and W. C. Hall. “The medial geniculate body of the tree shrew, Tupaia glis. II. Connections with the neocortex.J Comp Neurol, vol. 182, no. 3, Dec. 1978, pp. 459–93. Pubmed, doi:10.1002/cne.901820306.
Oliver DL, Hall WC. The medial geniculate body of the tree shrew, Tupaia glis. II. Connections with the neocortex. J Comp Neurol. 1978 Dec 1;182(3):459–493.
Journal cover image

Published In

J Comp Neurol

DOI

ISSN

0021-9967

Publication Date

December 1, 1978

Volume

182

Issue

3

Start / End Page

459 / 493

Location

United States

Related Subject Headings

  • Tupaiidae
  • Temporal Lobe
  • Strepsirhini
  • Species Specificity
  • Neurology & Neurosurgery
  • Neural Pathways
  • Mesencephalon
  • Haplorhini
  • Geniculate Bodies
  • Cats