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motoneuron
(redirected from lower motoneuron)

   Also found in: Dictionary/thesaurus, Encyclopedia 0.01 sec.
motoneuron /mo·to·neu·ron/ (mōt″o-nldbomacr´on) motor neuron; a neuron having a motor function; an efferent neuron conveying motor impulses.
Enlarge picture
Motoneuron shown as the efferent neuron in a three-neuron reflex arc.

lower motoneuron  a peripheral neuron whose cell body lies in the ventral gray columns of the spinal cord and whose termination is in a skeletal muscle.
peripheral motoneuron  in a reflex arc, a motoneuron that receives impulses from interneurons.
upper motoneuron  a neuron in the cerebral cortex that conducts impulses from the motor cortex to a motor nucleus of one of the cerebral nerves or to a ventral gray column of the spinal cord.

mo·to·neu·ron (mt-nrn)
n.
A motor neuron.

motoneuron
[mō′tōnoo͡r′on]
Etymology: L, movere, to move; Gk, neuron, nerve
a motor neuron. Its function is to produce muscle contractions.

motoneuron [mo″to-noor´on]
a neuron having a motor function; an efferent neuron conveying motor impulses. Called also motor neuron.
lower motoneuron a peripheral neuron whose cell body lies in the ventral gray columns of the spinal cord and whose termination is in a skeletal muscle.
peripheral m's neurons in a peripheral reflex arc that receive impulses from interneurons and transmit them to voluntary muscles.
upper motoneuron a neuron in the cerebral cortex that conducts impulses from the motor cortex to a motor nucleus of one of the cerebral nerves or to a ventral gray column of the spinal cord.


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