Dynamic properties of the posterior cricoarytenoid muscle

Donald S. Cooper, Maisie Shindo, Malcolm H. Hast, Uttam Sinha, Dale H. Rice

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

The aim of this research was to investigate the contractile properties of the posterior cricoarytenoid (PCA) muscle. Simultaneous measurements were made of the isometric force, temperature, and electromyographic activity of the dorsal cricoarytenoid muscle of anesthetized dogs during supramaximal stimulation of the recurrent laryngeal nerve for twitch and tetanic contraction. The conduction delay between stimulation of the recurrent nerve at the level of the larynx and the onset of the muscle action potential averaged 2.0 ± 0.2 milliseconds (ms), and the latent period between the onset of electrical activity of the muscle and the onset of contraction had a mean duration of 3.3 ± 0.8 ms. The mean of isometric contraction times found was 33.3 ± 2.0 ms, shorter than most previous studies of canine PCA muscle. Tetanic frequency defined as smooth contraction was higher than previous estimates. Considerations of scaling of physiological time based on animal mass were applied to analysis of the experimental findings to make possible systematic comparison of previous findings across species and animal size.

Original languageEnglish (US)
Pages (from-to)937-944
Number of pages8
JournalAnnals of Otology, Rhinology & Laryngology
Volume103
Issue number12
DOIs
StatePublished - Dec 1994

Keywords

  • larynx
  • physiological scaling
  • posterior cricoarytenoid muscle

ASJC Scopus subject areas

  • Otorhinolaryngology

Fingerprint Dive into the research topics of 'Dynamic properties of the posterior cricoarytenoid muscle'. Together they form a unique fingerprint.

  • Cite this