The size of motor units in laryngeal muscles of the rat.
The size of motor units in rat laryngeal muscles was determined by correlating the number of neurons labeled by i.m. injections of horseradish peroxidase with the number of motor end plates stained for acetylcholinesterase. The cricothyroid has a motor unit size of 8 muscle fibers per motor neuron and the posterior cricoarytenoid 4-5 muscle fibers per motor neuron.
D000110:Acetylcholinesterase / Q000032:analysis; D000344:Afferent Pathways / Q000502:physiology; D000818:Animals; D001370:Axonal Transport; D001933:Brain Stem / Q000502:physiology; D006735:Horseradish Peroxidase; D007830:Larynx / Q000166:cytology*; D009043:Motor Activity; D009045:Motor Endplate / Q000502:physiology*; D009132:Muscles / Q000294:innervation*; D009469:Neuromuscular Junction / Q000502:physiology*; D009474:Neurons / Q000502:physiology*; D051381:Rats
D006735:Horseradish Peroxidase; D000110:Acetylcholinesterase