Dorsal root
Dorsal Root
The Dorsal Root (pronunciation: /ˈdɔːrsəl ruːt/) is a crucial component of the Peripheral Nervous System (PNS).
Etymology
The term 'Dorsal Root' originates from the Latin word 'dorsum' meaning 'back' and the Old English word 'rōt' meaning 'root'.
Definition
The Dorsal Root is a branch of a Spinal Nerve that is responsible for carrying sensory information from the peripheral nervous system to the Spinal Cord. It is the afferent sensory root of a spinal nerve and is located on the dorsal side (back side) of the spinal cord.
Function
The primary function of the Dorsal Root is to transmit sensory information from the body to the spinal cord. This information includes touch, temperature, pain, and proprioceptive signals. The Dorsal Root does not contain any motor fibers; these are located in the Ventral Root.
Related Terms
- Dorsal Root Ganglion: A cluster of nerve cell bodies (a ganglion) in a dorsal root of a spinal nerve.
- Dorsal Root Entry Zone: The area where the dorsal root fibers enter the spinal cord.
- Dorsal Root Rhizotomy: A surgical procedure to cut the dorsal root, often performed to relieve pain.
See Also
- Spinal Cord
- Peripheral Nervous System
- Ventral Root
- Dorsal Root Ganglion
- Dorsal Root Entry Zone
- Dorsal Root Rhizotomy
External links
- Medical encyclopedia article on Dorsal root
- Wikipedia's article - Dorsal root
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