Endoneurium
| Endoneurium | |
|---|---|
myelin sheath of nerves | |
| System | Nervous system |
| Identifiers | |
| TA98 | A14.2.00.014 |
| TA2 | 6158 |
| FMA | 52586 |
| Anatomical terminology] | |
The endoneurium (also called endoneurial channel, endoneurial sheath, endoneurial tube, or Henle's sheath) is a layer of delicate
nerve fiber in the peripheral nervous system.[1] Its component cells are called endoneurial cells.[2] The endoneuria with their enclosed nerve fibers are bundled into groups called nerve fascicles,[3] each fascicle within its own protective sheath called a perineurium.[3][4] In sufficiently large nerves multiple fascicles, each with its blood supply and fatty tissue, may be bundled within yet another sheath, the epineurium
.
The endoneurium contains a liquid known as
endoneurial fluid, which contains little protein. In the peripheral nervous system the endoneurial fluid is notionally equivalent to cerebrospinal fluid in the central nervous system. Peripheral nerve injuries commonly release increased amounts of endoneurial fluid into surrounding tissues; these can be detected by magnetic resonance neurography
, thereby assisting in locating injuries to peripheral nerves.
The endoneurium runs longitudinally along the nerve fiber, but with discontinuities where
auditory nerve.[6]
See also
- Connective tissue in the peripheral nervous system
- Epineurium
- Nerve
- Nerve fascicle
- Nerve fiber
- Nervous system
- Perineurium
References
- ^ "Neurohistology lecture" (PDF). Retrieved 27 April 2019.
- ISBN 978-0-8053-5909-1.
- ^ ISBN 978-0-7020-3100-7, retrieved 2020-11-18
- ISBN 978-0-12-738761-1, retrieved 2020-11-18
- ISBN 978-0-12-410390-0, retrieved 2020-11-18
- PMID 10697296.
External links
- Histology image: 21301loa – Histology Learning System at Boston University - "Ultrastructure of the Cell: myelinated axon and Schwann cell"
- Histology image: 21401loa – Histology Learning System at Boston University - "Ultrastructure of the Cell: arteriole and peripheral nerve"
- Histology image: 1_03 at the University of Oklahoma Health Sciences Center
- Histology at University of California, Los Angeles
- Diagram at Howard University
