gamma motor neurons

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Related to gamma motor neurons: gamma loop

gam·ma loop

the reflex arc consisting of small anterior horn nerve cells and their small fibers that project to the intrafusal bundle produce its contraction, which initiates the afferent impulses that pass through the posterior root to the anterior horn cells, inducing, in turn, reflex contraction of the entire muscle.

gam·ma mo·tor neu·rons

(gam'ă mō'tŏr nūr'onz)
Motor neurons that terminate in skeletal muscle, and synapse with sensory neuromuscular spindles; work with neuromuscular spindles to regulate skeletal muscle tone below levels of conscious control.
Compare: alpha (α) motor neuron
Synonym(s): gamma lower motor neuron.