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Motor Neurons, Gamma

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Definition: Motor neurons which activate the contractile regions of intrafusal SKELETAL MUSCLE FIBERS, thus adjusting the sensitivity of the MUSCLE SPINDLES to stretch. Gamma motor neurons may be "static" or "dynamic" according to which aspect of responsiveness (or which fiber types) they regulate. The alpha and gamma motor neurons are often activated together (alpha gamma coactivation) which allows the spindles to contribute to the control of movement trajectories despite changes in muscle length.     
See Also Muscle Spindles 		Other names Neurons, Gamma Motor; Neurons, Fusimotor; Neurons, Gamma-Efferent Motor; Neuron, Gamma-Efferent Motor; Neuron, Gamma Motor; Neuron, Fusimotor; Motor Neurons, Gamma Efferent; Motor Neuron, Gamma-Efferent; Motor Neuron, Gamma; Gamma-Efferent Motor Neurons; Gamma-Efferent Motor Neuron; Gamma Motor Neurons; Gamma Motor Neuron; Fusimotor Neurons; Fusimotor Neuron; Motor Neurons, Gamma-Efferent

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Sources: NLM Medical Subject Headings, NIH UMLS, Drugs@FDA, FDA AERS original data copyright United States Government. No endorsement implied. Last modified 6/6/2012
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