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

Nerve Fibers, Unmyelinated MeSH Descriptor Data 2025


MeSH Heading
Nerve Fibers, Unmyelinated
Tree Number(s)
A08.675.542.756
A11.671.501.756
Unique ID
D036421
RDF Unique Identifier
http://id.nlm.nih.gov/mesh/D036421
Scope Note
A class of nerve fibers as defined by their nerve sheath arrangement. The AXONS of the unmyelinated nerve fibers are small in diameter and usually several are surrounded by a single MYELIN SHEATH. They conduct low-velocity impulses, and represent the majority of peripheral sensory and autonomic fibers, but are also found in the BRAIN and SPINAL CORD.
Entry Term(s)
C Fibers
Previous Indexing
Nerve Fibers (1976-2002)
See Also
Gray Matter
Public MeSH Note
2003; for C FIBERS see NERVE FIBERS 1977-2002
History Note
2003; for C FIBERS use NERVE FIBERS 1977-2002
Date Established
2003/01/01
Date of Entry
2002/07/03
Revision Date
2014/06/10
Nerve Fibers, Unmyelinated Preferred
C Fibers Narrower
page delivered in 0.125s