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Organization of the superior olivary complex in the guinea pig: II. Patterns of projection from the periolivary nuclei to the inferior colliculus.

Publication ,  Journal Article
Schofield, BR; Cant, NB
Published in: J Comp Neurol
March 22, 1992

The superior olivary complex is a major source of auditory projections to the inferior colliculus. Although the projections from the medial and lateral superior olivary nuclei have been well characterized, projections from the surrounding periolivary nuclei have received relatively little attention. In the guinea pig, cytoarchitectonic criteria can be used to distinguish 11 periolivary nuclei that can be divided into four groups. These are: 1) a lateral group that comprises the anterolateral and posteroventral periolivary nuclei and the lateral nucleus of the trapezoid body; 2) a dorsal group that comprises the dorsal and dorsolateral periolivary nuclei; 3) a ventral group that comprises the rostral, ventromedial, and anteroventral periolivary nuclei and the ventral nucleus of the trapezoid body; and 4) a medial group that comprises the superior paraolivary nucleus and the medial nucleus of the trapezoid body. In the present study we used horseradish peroxidase and fluorescent tracers to identify olivocollicular cells in each of the periolivary nuclei. The lateral, dorsal, and medial periolivary groups project bilaterally, and the ventral periolivary group projects ipsilaterally. Within groups, individual nuclei contain different numbers of olivocollicular cells. The posteroventral periolivary nucleus is the only periolivary nucleus that does not project to the inferior colliculus. The superior paraolivary nucleus is the only periolivary nucleus that contains significant numbers of individual cells that project to both inferior colliculi. The remaining periolivary nuclei project only ipsilaterally or contain separate populations of cells that project to the two inferior colliculi.

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Published In

J Comp Neurol

DOI

ISSN

0021-9967

Publication Date

March 22, 1992

Volume

317

Issue

4

Start / End Page

438 / 455

Location

United States

Related Subject Headings

  • Stilbamidines
  • Olivary Nucleus
  • Neurons, Afferent
  • Neurology & Neurosurgery
  • Inferior Colliculi
  • Horseradish Peroxidase
  • Guinea Pigs
  • Fluorescent Dyes
  • Auditory Pathways
  • Animals
 

Citation

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Schofield, B. R., & Cant, N. B. (1992). Organization of the superior olivary complex in the guinea pig: II. Patterns of projection from the periolivary nuclei to the inferior colliculus. J Comp Neurol, 317(4), 438–455. https://doi.org/10.1002/cne.903170409
Schofield, B. R., and N. B. Cant. “Organization of the superior olivary complex in the guinea pig: II. Patterns of projection from the periolivary nuclei to the inferior colliculus.J Comp Neurol 317, no. 4 (March 22, 1992): 438–55. https://doi.org/10.1002/cne.903170409.
Schofield, B. R., and N. B. Cant. “Organization of the superior olivary complex in the guinea pig: II. Patterns of projection from the periolivary nuclei to the inferior colliculus.J Comp Neurol, vol. 317, no. 4, Mar. 1992, pp. 438–55. Pubmed, doi:10.1002/cne.903170409.
Journal cover image

Published In

J Comp Neurol

DOI

ISSN

0021-9967

Publication Date

March 22, 1992

Volume

317

Issue

4

Start / End Page

438 / 455

Location

United States

Related Subject Headings

  • Stilbamidines
  • Olivary Nucleus
  • Neurons, Afferent
  • Neurology & Neurosurgery
  • Inferior Colliculi
  • Horseradish Peroxidase
  • Guinea Pigs
  • Fluorescent Dyes
  • Auditory Pathways
  • Animals