epineurium

Physiology

(noun)

The outermost layer of dense, irregular connective tissue surrounding a peripheral nerve.

Related Terms

  • nerves
  • tracts
  • perineurium
  • glycocalyx
  • endoneurium
  • fascicles
  • endoneurial fluid
  • fascicle
  • nerve
  • tract
Biology

(noun)

the connective tissue framework and sheath of a nerve which bind together the nerve bundles, each of which has its own special sheath, or perineurium

Related Terms

  • thermoreceptor
  • somatosensory

Examples of epineurium in the following topics:

  • Structure of a Nerve

    • Finally, the entire nerve is wrapped in a layer of connective tissue called the epineurium.
    • An illustration of a cross-section of a nerve highlighting the epineurium and perineurium.
  • Axon Bundles

    • Each nerve consisting  of many fascicles is covered externally by a dense sheath of connective tissue, the epineurium.
  • Optic (II) Nerve

    • The optic nerve is ensheathed in all three meningeal layers (dura, arachnoid, and pia mater) rather than the epineurium, perineurium, and endoneurium found in the peripheral nerves.
  • Injuries to Nerves Emerging from the Brachial Plexus

    • The epineurium of the nerve is contiguous with the dura mater, providing extra support to the nerve.
  • Thermoreception

    • End-bulbs are found in the conjunctiva of the eye, in the mucous membrane of the lips and tongue, and in the epineurium of nerve trunks.
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