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Encyclopedia > Motor nerve
Motor nerve
Motor nerve cell from ventral horn of medulla spinalis of rabbit. The angular and spindle-shaped Nissl bodies are well shown.
Gray's subject #183 730

Motor nerves allow the brain to stimulate muscle contraction. A motor nerve is an efferent nerve that exclusively contains the axons of somatic and branchial motoneurons, which innervate skeletal muscles (that insure locomotion) and branchial muscles (that motorize the face and neck). Image File history File links No higher resolution available. ... The anterior horn is the anterior division of the lateral ventricle of the brain. ... The spinal cord is a part of the vertebrate nervous system that is enclosed in and protected by the vertebral column (it passes through the spinal canal). ... Genera Pentalagus Bunolagus Nesolagus Romerolagus Brachylagus Sylvilagus Oryctolagus Poelagus Rabbits are small mammals in the family Leporidae of the order Lagomorpha, found in several parts of the world. ... In animals the brain, or encephalon (Greek for in the head), is the control center of the central nervous system, responsible for thought. ... Nerves (yellow) Nerves redirects here. ... Efferent nerve fibers carry information away from the brain. ... An axon or nerve fiber, is a long, slender projection of a nerve cell, or neuron, that conducts electrical impulses away from the neurons cell body or soma. ... In vertebrates, motoneurons (also called motor neurons) are efferent neurons that originate in the spinal cord and synapse with muscle fibers to facilitate muscle contraction and with muscle spindles to modify proprioceptive sensitivity. ... Structure of a skeletal muscle Skeletal muscle is a type of striated muscle, attached to the skeleton. ...


See also

In vertebrates, the term motor neuron (or motoneuron) classically applies to neurons located in the central nervous system (CNS) which project their axons outside the CNS and directly or indirectly control muscles. ... The mechanism of the reflex arc Sensory nerves are nerves that receive sensory stimuli, such as how something feels and if it is painful. ... In the nervous system, efferent nerves otherwise known as motor or effector neuron carry nerve impulses away from the central nervous systemto effectors - either muscles or glands. ...

External links


  Results from FactBites:
 
AANS.org | Education and Meetings | AANS Scientific Journals | Neurosurgical Focus (1379 words)
A biopsy specimen of the motor nerve to the gracilis muscle was obtained in 151 patients to aid in the diagnosis of neuromuscular disorders.
Biopsy of the motor nerve of the gracilis muscle is indicated in neuromuscular diseases that affect the thigh adductor musculature.
The motor nerve of the gracilis is seen to proceed from proximal--lateral to distal--medial at approximately a 45° angle to the long axis of the limb.
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