Anatomy

Gamma Motor Neurons

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.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

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.

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Synonyms

20 entry terms
  • Gamma Motorneurons
  • Motor Neurons, Gamma
  • Motor Neurons, Gamma-Efferent
  • Neurons, Fusimotor
  • Neurons, Gamma Motor
  • Fusimotor Neuron
  • Fusimotor Neurons
  • Gamma Motor Neuron
  • Gamma Motorneuron
  • Gamma-Efferent Motor Neuron
  • Gamma-Efferent Motor Neurons
  • Motor Neuron, Gamma
  • Motor Neuron, Gamma-Efferent
  • Motor Neurons, Gamma Efferent
  • Motorneuron, Gamma
  • Motorneurons, Gamma
  • Neuron, Fusimotor
  • Neuron, Gamma Motor
  • Neuron, Gamma-Efferent Motor
  • Neurons, Gamma-Efferent Motor

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Aspects Covered

15 allowable subheadings

Indexed with the subheadings chemistry, classification, cytology, drug effects, enzymology, immunology, metabolism, microbiology, parasitology, pathology, physiology, radiation effects, transplantation, ultrastructure, virology.

MeSH Record

History Note

91(79); was see under MOTOR NEURONS 1979-90; was MOTOR NEURONS, GAMMA EFFERENT see under MOTOR NEURONS 1975-78

MeSH Hierarchy

Tree Numbers

  1. A08w.675w.655.500w.525w
  2. A11w.671w.655.500w.525w

MeSH Record

NLM Classification

WL 102.7

AMA Style

References

  1. National Library of Medicine. Gamma Motor Neurons. Medical Subject Headings (MeSH). 2026. Unique ID D009047. http://id.nlm.nih.gov/mesh/2026/D009047
  2. Gamma Motor Neurons. In: Wikipedia. https://en.wikipedia.org/wiki/Gamma_motor_neuron
  3. Gamma Motor Neurons. In: Wikidata. https://www.wikidata.org/wiki/Q3866857