A neuron conducting impulses outwards from the brain or spinal cord WordNet 3.0 & Open English WordNet

A motor neuron is a neuron whose cell body is located in the motor cortex, brainstem or the spinal cord, and whose axon projects to the spinal cord or outside of the spinal cord to directly or indirectly control effector organs, mainly muscles and glands. Wikipedia

Neuron whose cell body is located in the motor cortex, brainstem or the spinal cord, and whose axon projects to the spinal cord or outside of the spinal cord to directly or indirectO control effector organs, mainly muscles and glands Wikidata

A neuron located in the central nervous system that projects its axon outside the CNS and directly or indirectly control muscles. Wiktionary