Histological identification of (static) skeletofusimotor innervation to a cat muscle spindle.
Two skeletofusimotor (beta) axons were identified histologically in cat tenuissimus muscle. The axons supplied the distal poles of 3 intrafusal muscle fibers of the nuclear chain type and two extrafusal fibers of the fast twitch type. The observations strengthen the case for the existence of static beta-innervation to cat muscle spindles.
D000818:Animals; D001369:Axons / Q000502:physiology / Q000648:ultrastructure; D002415:Cats; D008854:Microscopy, Electron; D009045:Motor Endplate / Q000502:physiology* / Q000648:ultrastructure; D009119:Muscle Contraction; D009132:Muscles / Q000294:innervation* / Q000648:ultrastructure; D009186:Myelin Sheath / Q000502:physiology; D009469:Neuromuscular Junction / Q000502:physiology*