Nerve fascicle
Nerve Fascicle
A Nerve Fascicle (pronounced: /ˈnɜːrv ˈfæsɪkəl/) is a small bundle of nerve fibers, enclosed by a layer of connective tissue known as the perineurium. It is a key component of the peripheral nervous system.
Etymology
The term "Nerve Fascicle" is derived from the Latin word "fasciculus", which means "small bundle". The term "nerve" is derived from the Latin word "nervus", which means "sinew, tendon".
Structure
A nerve fascicle is composed of numerous axons, each of which is surrounded by a layer of connective tissue known as the endoneurium. These axons are bundled together and enclosed by another layer of connective tissue, the perineurium. Multiple nerve fascicles, along with blood vessels, are then bundled together by a third layer of connective tissue, the epineurium, to form a nerve.
Function
Nerve fascicles serve to bundle nerve fibers together within the peripheral nervous system. This bundling serves to increase the speed and efficiency of nerve impulse transmission.
Related Terms
- Nerve: A bundle of nerve fibers that transmits electrical impulses toward and away from the brain and spinal cord.
- Axon: The long, threadlike part of a nerve cell along which impulses are conducted from the cell body to other cells.
- Perineurium: The sheath of connective tissue enclosing a bundle (fascicle) of nerve fibers.
- Endoneurium: The delicate connective tissue surrounding the individual nerve fibers within a nerve.
- Epineurium: The outermost layer of dense irregular connective tissue surrounding a peripheral nerve.
External links
- Medical encyclopedia article on Nerve fascicle
- Wikipedia's article - Nerve fascicle
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