The electromyographic activity of intrinsic laryngeal muscles during quiet breathing in the anaesthetized horse

Abstract

Abstract Extract Electromyographic examination of intrinsic laryngeal muscular activity has been carried out in man (Faaborg-Anderson, 1957 Andrew, B. L. 1955. The respiratory displacemen of the larynx; A study of the innervation of accessory respiratory muscles. J. Physiol, Lond., 130: 474–487. [Crossref] , [Google Scholar]) and some experimental animals including the cat (Green and Neil, 1955 Armstrong, B. W. and Smith, D. J. 1955. Function of certain neck muscles during the respiratory cycle. Am. J. Physiol, 182: 599–600. [Crossref], [PubMed] , [Google Scholar]; Rex, 1969 Duncan, I. D., Griffiths, I. R., McQueen, A. and Baker, G. O. 1974. The pathology of equine laryngeal hemiplegia. Acta neuropath., 27: 337–348. [Crossref], [PubMed], [Web of Science ®] , [Google Scholar]), dog (Nakamura et al., 1958 Faaborg-Anderson, K. 1957. Electromyographic investigation of intrinsic laryngeal muscles in humans. Acta physiol. scand., 41(Suppl. 140): 91–148. [Google Scholar]; Siribodhi et al., 1963 Green, J. H. and Neil, E. 1955. The respiratory function of the laryngeal muscles. J. Physiol, Lond., 129: 134–141. [Crossref] , [Google Scholar]), goat (Murtagh and Campbell, 1954 Hiroto, I., Hirano, M., Toyozumi, Y. and Shin, T. 1964. Function of laryngeal muscles. Otorhino- & lar. clin., 57: 1–9. [Google Scholar]) and monkey (Lund and Palmer, 1969 Knutsson, E., Martensson, A. and Martensson, B. 1969. The normal eleotromyogram in human vocal muscles. Acta oto-lar., 68: 526–536. [Taylor & Francis Online] , [Google Scholar]). The purpose of these investigations has been to increase understanding of the action of the laryngeal muscles and to provide a basis on which to compare the normal individual with those suffering from neurogenic and myogenic disorders of the larynx.