dorsal root

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dorsal root

n.
Either of the two roots of a spinal nerve, consisting of sensory fibers and arising from the posterior section of the spinal cord.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.dorsal root - one of the two roots of a spinal nerve that passes dorsally to the spinal cord and that consists of sensory fibers
afferent, afferent nerve, sensory nerve - a nerve that passes impulses from receptors toward or to the central nervous system
nervus spinalis, spinal nerve - any of the 31 pairs of nerves emerging from each side of the spinal cord (each attached to the cord by two roots: ventral and dorsal)
References in periodicals archive ?
The dorsal roots (primary afferent tissues) contain opioid-binding sites and fentanyl either acts directly on the spinal nerve or by penetrating the duramater to act at the spinal roots.
After stimulation and control CMGs, spinal dorsal roots from L5 to S3 were transected sequentially.
Some authors consider that PDLs coincide with the axial lines of Sherrington, which are virtual lines that separate dermatomes arising from nonconsecutive dorsal roots [8, 9].
Comment: Persistent mechanical irritation of the nerve root (as seen with degenerated or herniated discs) sets up a series of events that lead to chronic pain, mediated by sensitization of the dorsal roots and dorsal horns in the spinal cord.
The dorsal roots of L2 and L3 have lesser branches, which make up the lateral cutaneous nerve of the thigh, and greater branches, that along with the dorsal root of L4 are the origins of the femoral nerve.
Effect of Lissauer tract stimulation on activity in dorsal roots and in ventral roots.
The ventral and dorsal roots contain nerves that leave and enter the spinal cord, respectively.
A similar preparation was used for identifying afferent mechanosensory activity in the dorsal roots.
The dorsal root entry zone (DREZ) forms the junction between the dorsal roots of the PNS and the spinal cord (CNS).
They are derived from the neuroblastic anlage associated with the dorsal roots of vertebral somites or primitive cells associated with cranial nerve ganglia.
Surgical techniques are focussed on lesions of peripheral nerves, dorsal roots, the sympathetic nervous system, or parts of the CNS such as the spinal cord or thalamic nuclei.
Ventral roots leaving the cord contain motor (pertaining to movement) fibers; whereas, dorsal roots entering the cord contain sensory (pertaining to feeling) fibers.