dorsal root

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root

 [roōt]
1. the descending and subterranean part of a plant.
2. that portion of an organ, such as a tooth, hair, or nail, that is buried in the tissues, or by which it arises from another structure, or the part of a nerve that is adjacent to the center to which it is connected.
Tooth anomalies with variations in root form. From Darby and Walsh, 1994.
anterior root the anterior, or motor, division of each spinal nerve, attached centrally to the spinal cord and joining peripherally with the posterior root to form the nerve before it emerges from the intervertebral foramen; it conveys motor fibers to skeletal muscle and contains preganglionic autonomic fibers at the thoracolumbar and sacral levels. Called also ventral root.
dorsal root posterior root.
motor root anterior root.
nerve r's the series of paired bundles of nerve fibers which emerge at each side of the spinal cord, termed dorsal (or posterior) or ventral (or anterior) according to their position. There are 31 pairs (8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal), each corresponding dorsal and ventral root joining to form a spinal nerve. Certain cranial nerves, e.g., the trigeminal, also have nerve roots.
posterior root the posterior, or sensory, division of each spinal nerve, attached centrally to the spinal cord and joining peripherally with the anterior root to form the nerve before it emerges from the intervertebral foramen; each posterior root bears a spinal ganglion that conveys sensory fibers to the spinal cord. Called also dorsal root.
sensory root posterior root.
ventral root anterior root.

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.

dorsal root

 Posterior root, see there.

dor·sal root

(dōr'săl rūt)
The sensory root of a spinal nerve, having a dorsal root ganglion containing the nerve cell bodies of the fibers conveyed by the root in its distal end.

dorsal root

a nerve trunk containing only sensory axons, that enters the SPINAL CORD near the dorsal surface.
References in periodicals archive ?
LaMotte, "Distribution of the tract of Lissauer and the dorsal root fibers in the primate spinal cord," Journal of Comparative Neurology, vol.
Perl, "Relationship of substance P to afferent characteristics of dorsal root ganglion neurones in guinea-pig," Journal of Physiology, vol.
Nitkunan et al., "Nerve growth factor treatment increases brain-derived neurotrophic factor selectively in TrkA-expressing dorsal root ganglion cells and in their central terminations within the spinal cord," Journal of Neuroscience, vol.
The effect on peripheral nerve injury on dorsal root potentials and on transmission of afferent signals into the spinal cord.
Sensory afferent impulses from dorsal root ganglia as well as from the periphery in normal and nerve injured rats.
The effect of GABA and 5-HT antagonists on rat dorsal root potentials.
Stimulation of ventral roots induced bursts of activity in nearby dorsal roots (Fig.
The recording electrodes were attached either to dorsal roots (Fig.
Figure 6A shows the potential recorded from two dorsal roots 2 cm apart (inset Fig.
Neurotrophic agents in fibrin glue mediate adult dorsal root regeneration into spinal cord.
Neurotrophic influence of denervated sciatic nerve on adult dorsal root ganglion neurons.
Putative inhibitory extracellular matrix molecules at the dorsal root entry zone of the spinal cord during development and after root and sciatic nerve lesions.