Description: Large lower motor neuron of the brainstem and spinal cord. They innervate extrafusal muscle fibers of skeletal muscle and are directly responsible for initiating their contraction. Alpha motor neurons are distinct from gamma motor neurons, which innervate intrafusal muscle fibers of muscle spindles.
Preferred ID: SAO:1154704263 Type: term ID# ILX:0110941 Score: 40.36439