Medical Definition of Lower motor neuron
Lower motor neuron: A nerve cell that goes from the spinal cord to a muscle. The cell body of a lower motor neuron is in the spinal cord and its termination is in a skeletal muscle. The loss of lower motor neurons leads to weakness, twitching of muscle (fasciculation), and loss of muscle mass (muscle atrophy).
Last Editorial Review: 5/13/2016
Back to MedTerms online medical dictionary A-Z List
Need help identifying pills and medications?