Optic Chiasm and Tract

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The nerve fibers from the retinal ganglion cells in each eye travel through the chiasm and the optic tract before synapsing at the lateral geniculate nuclei. In the optic chiasm, the fibers originating from the nasal part of the retina of each eye decussate, whereas the temporal fibers pass through uncrossed. The optic tract on each side contains crossed nasal retinal fibers from the opposite eye and the uncrossed temporal fibers from the same eye. As a result, lesions of this region involving these two structures produce characteristic defects of the visual field that can help in diagnosing the disease.

Original languageEnglish (US)
Title of host publicationEncyclopedia of the Neurological Sciences
PublisherElsevier Inc.
Pages669-671
Number of pages3
ISBN (Electronic)9780123851574
ISBN (Print)9780123851581
DOIs
StatePublished - Jan 1 2014

Keywords

  • Bitemporal hemianopia
  • Homonymous hemianopia
  • Optic chiasm
  • Optic tract
  • Pituitary adenoma

ASJC Scopus subject areas

  • Medicine(all)

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  • Cite this

    Kedar, S. (2014). Optic Chiasm and Tract. In Encyclopedia of the Neurological Sciences (pp. 669-671). Elsevier Inc.. https://doi.org/10.1016/B978-0-12-385157-4.00147-0