motoneuron (redirected from lower motoneuron)

motoneuron /mo·to·neu·ron/ (mot?o-nldbomacr´on) motor neuron; a neuron having a motor function; an efferent neuron conveying motor impulses.

Motoneuron shown as the efferent neuron in a three-neuron reflex arc.

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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.

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mo·to·neu·ron (mt-nrn)

n.

A motor neuron.