, Volume 38, Issue 3, pp 360–361 | Cite as

The size of motor units in laryngeal muscles of the rat

  • C. F. L. Hinrichsen
  • A. Ryan


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.


Muscle Fiber Motor Neuron Horseradish Peroxidase Motor Unit Acetylcholinesterase 
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Copyright information

© Birkhäuser Verlag 1982

Authors and Affiliations

  • C. F. L. Hinrichsen
    • 1
  • A. Ryan
    • 1
  1. 1.Departments of Anatomy and PhysiologyUniversity of TasmaniaHobart(Australia)

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