| 释义 |
anterior root
Thesaurus| Noun | 1. | anterior root - one of two the two roots of a spinal nerve that passes ventrally from the spinal cord and that consists of motor fibersanterior horn, ventral horn, ventral rootefferent, efferent nerve, motor nerve - a nerve that conveys impulses toward or to muscles or glandsnervus 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) |
EncyclopediaSeerootanterior 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 rootOne of the two roots by which a spinal nerve is attached to the spinal cord; contains efferent nerve fibers. See also: rootanterior root the VENTRAL ROOT of a nerve.LegalSeeRootanterior root
Related to anterior root: ventral rootSynonyms for anterior rootnoun one of two the two roots of a spinal nerve that passes ventrally from the spinal cord and that consists of motor fibersSynonyms- anterior horn
- ventral horn
- ventral root
Related Words- efferent
- efferent nerve
- motor nerve
- nervus spinalis
- spinal nerve
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