title: Comments on Abbs's (1973) discussion of the gamma system.
mesh_terms: D000818:Animals; D005152:Facial Muscles / Q000294:innervation; D006801:Humans; D007568:Jaw / Q000294:innervation* / Q000502:physiology; D009046:Motor Neurons / Q000502:physiology*; D009047:Motor Neurons, Gamma / Q000502:physiology*; D009068:Movement; D009470:Muscle Spindles / Q000502:physiology; D013060:Speech / Q000502:physiology*