Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted. The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov. Updates regarding government operating status and resumption of normal operations can be found at opm.gov.

NLM Logo

Pyramidal Tracts MeSH Descriptor Data 2025


MeSH Heading
Pyramidal Tracts
Tree Number(s)
A08.186.854.300
A08.612.380.730
Unique ID
D011712
RDF Unique Identifier
http://id.nlm.nih.gov/mesh/D011712
Scope Note
Fibers that arise from cells within the cerebral cortex, pass through the medullary pyramid, and descend in the spinal cord. Many authorities say the pyramidal tracts include both the corticospinal and corticobulbar tracts.
Entry Term(s)
Corticobulbar Tracts
Corticospinal Tracts
Decussation, Pyramidal
NLM Classification #
WL 400
Date Established
1966/01/01
Date of Entry
1999/01/01
Revision Date
2018/07/01
Pyramidal Tracts Preferred
Decussation, Pyramidal Related
Corticospinal Tracts Narrower
Corticobulbar Tracts Narrower
page delivered in 0.139s