Fasciculus
Fasciculus
Fasciculus (pronounced: fuh-sik-yuh-luhs) is a term used in anatomy and neuroscience to describe a bundle of neuronal axons.
Etymology
The term "fasciculus" is derived from the Latin word "fascis", meaning "bundle". It is used in anatomy to describe a bundle of structures, such as nerve fibers.
Definition
In the field of neuroanatomy, a fasciculus is a bundle of axons (the long, slender projections of neurons) that have a common origin, termination, and function. These bundles are enveloped by a layer of connective tissue known as the perineurium. Fasciculi are found in many parts of the nervous system, including the spinal cord and the brain.
Related Terms
- Neuron: The basic working unit of the brain, a specialized cell designed to transmit information to other nerve cells, muscle, or gland cells.
- Axon: A long, slender projection of a nerve cell, or neuron, that typically conducts electrical impulses away from the neuron's cell body.
- Perineurium: The sheath of connective tissue enclosing a bundle of nerve fibers.
- Spinal Cord: The major column of nerve tissue that is connected to the brain and lies within the vertebral canal and from which the spinal nerves emerge.
- Brain: The organ of the body in the head that controls functions, movements, sensations, and thoughts.
External links
- Medical encyclopedia article on Fasciculus
- Wikipedia's article - Fasciculus
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