dorsal root

(redirected from Posterior roots)
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Related to Posterior roots: ventral root, Spinal ganglia

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 ?
After fixation, the lumbar spinal cords with posterior roots were removed en bloc and each was dissected into three gross samples (A, B and C): the transverse section with lumbar spinal cord of L3 (sample A) for light microscopic examination and TUNEL staining (see TUNEL staining for apoptosis below), the posterior corner section of L3 (sample B), and the posterior roots section of L3 (sample C) for electron microscopic examination.
The histological changes were mainly observed in posterior roots and the adjacent posterior white matter.
Our experiments suggest that histological changes within the spinal cord after 48 hours exposure to ropivacaine are similar to those from lignocaine, the neuronal injury being mainly in the posterior roots and posterior white matter.

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