anterior root


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Related to anterior root: ventral root

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.

anterior root

The anterior projection of the spinal cord, composed of axons of motor neurons.

anterior root

One of the two roots by which a spinal nerve is attached to the spinal cord; contains efferent nerve fibers.
See also: root

anterior root

the VENTRAL ROOT of a nerve.
References in periodicals archive ?
Show that similar effects are possible with sacral electrical stimulation via a sacral anterior root stimulator (SARS) implant in people with SCI (SARS implants are currently used for bladder emptying).
Sacral Electrical Stimulation via Sacral Anterior Root Stimulator Implant
Abbreviations: ASCII = American Standard Code for Information Interchange, C = cervical, CI = confidence interval, FES = functional electrical stimulation, FMS = functional magnetic stimulation, Hb = hemoglobin, IHB = index of cutaneous hemoglobin, IOX = index of oxygenation, IT = ischial tuberosity, PU = pressure ulcer, S = sacral, SARS = sacral anterior root stimulator, SCI = spinal cord injury, SEM = standard error of mean, T = thoracic, TRS = tissue reflectance spectrometry.

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