Encyclopedia of Clinical Neuropsychology

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

Precentral Gyrus

  • John BigbeeEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-57111-9_354

Synonyms

Motor strip; Primary motor area

Definition

Located in the frontal lobe of the cerebral cortex, the precentral gyrus is a vertically oriented, cerebral convolution located immediately anterior to, and running parallel with, the central sulcus. The precentral gyrus is the primary somatomotor motor cortex and sends efferent axons in the corticospinal tract to terminate on cranial and spinal motor neurons. The body is somatotopically represented on the gyrus in an inverted pattern with regions controlling the head located in the lower portions. Lesions in the precentral gyrus may result in weakness or paralysis in the corresponding region of the body.

Cross-References

Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Anatomy and NeurobiologyVirginia Commonwealth UniversityRichmondUSA