Encyclopedia of Clinical Neuropsychology

2018 Edition
| Editors: Jeffrey S. Kreutzer, John DeLuca, Bruce Caplan

Medial Geniculate Nuclei

  • John E. MendozaEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-57111-9_748

Synonyms

Medial geniculate body

Definition

Bilateral masses located on the caudal, inferior surface of the thalamus which serve as the relay nuclei for auditory input from the brainstem. The output of each is to the ipsilateral primary auditory cortex located in the temporal operculum (Heschl’s gyrus). Although receiving input from both ears (as a result of incomplete fiber crossings in the brainstem), there is a slight preponderance of contralateral representation. The nuclei evidence some laminations which are thought to help preserve the tonotopic organization from the organ of Corti to the cortex. Because auditory input after the cochlear nuclei is bilateral, unilateral lesions affecting the medial geniculate nucleus would not be expected to present with clinical significant auditory deficits.

Cross-References

Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Psychiatry and NeuroscienceTulane Medical School and SE Louisiana Veterans Healthcare SystemNew OrleansUSA