Three-dimensional anatomic characterization of the canine laryngeal abductor and adductor musculature

Corey W. Mineck, Roger Chan, Niro Tayama, Ingo R. Titze

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

The biomechanics of vocal fold abduction and adduction during phonation, respiration, and airway protection are not completely understood. Specifically, the rotational and translational forces on the arytenoid cartilages that result from intrinsic laryngeal muscle contraction have not been fully described. Anatomic data on the lines of action and moment arms for the intrinsic laryngeal muscles are also lacking. This study was conducted to quantify the 3-dimensional orientations and the relative cross- sectional areas of the intrinsic abductor and adductor musculature of the canine larynx. Eight canine larynges were used to evaluate the 3 muscles primarily responsible for vocal fold abduction and adduction: the posterior cricoarytenoid, the lateral cricoarytenoid, and the interarytenoid muscles. Each muscle was exposed and divided into discrete fiber bundles whose coordinate positions were digitized in 3-dimensional space. The mass, length, relative cross-sectional area, and angle of orientation for each muscle bundle were obtained to allow for the calculations of average lines of action and moment arms for each muscle. This mapping of the canine laryngeal abductor and adductor musculature provides important anatomic data for use in laryngeal biomechanical modeling. These data may also be useful in surgical procedures such as arytenoid adduction.

Original languageEnglish (US)
Pages (from-to)505-513
Number of pages9
JournalAnnals of Otology, Rhinology and Laryngology
Volume109
Issue number5 I
DOIs
StatePublished - Jan 1 2000

Keywords

  • Abduction
  • Adduction
  • Arytenoid cartilage
  • Laryngeal anatomy
  • Laryngeal muscle
  • Vocal fold

ASJC Scopus subject areas

  • Otorhinolaryngology

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