A nerve is formed by a collection of nerve fascicles (bundle of nerve fibers) which are surrounded by a loose connective tissue sheath known as the epineurium. The epineurium is the outermost layer of a peripheral nerve and is the strongest of all the connective tissue layers of the nerve.
The size and thickness of epineurium can vary from nerve to nerve, however, as a general rule the more fasiculi present within a nerve, the thicker the epineurium.
The epineurium aids in cushioning the nerve and contributes to its tensile strength. Loss of this connective tissue covering may be associated with pressure palsies.
|Definition||Outermost layer of peripheral nerve|
|Function||Cushions the nerve, contributes to tensile strength of nerve|
Take a closer look at the components of peripheral nerves in the study unit below.
Epineurium: want to learn more about it?
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