Lower motor neuron lesion

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

A lower motor neuron lesion is a lesion which affects nerve fibers traveling from the anterior horn of the spinal cord to the relevant muscle(s) — the lower motor neuron.

One major characteristic used to identify a lower motor neuron lesion is flaccid paralysis. This is in contrast to a upper motor neuron lesion, which often presents with spastic paralysis.

• http://library.med.utah.edu/neurologicexam/html/motor_anatomy.html#06
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