Thyroepiglottic part of thyroarytenoid muscle - CT head and neck - Axial - e-Anatomy
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Thyroepiglottic part of thyroarytenoid muscle

Pars thyreoepiglottica musculi thyreoarytenoidei

  • Latin synonym: Pars thyroepiglottica musculi thyroarytenoidei
  • Related terms: Thyroepiglottic part; Thyroepiglottic part (Thyroarytenoid)

Definition

Muhammad A. Javaid

The thyroepiglottic part of thyroarytenoid muscle consists of the superior fibres of the muscle that ascend toward the aryepiglottic fold. These fibres extend to the lateral margin of the epiglottis and blend with fibers of the aryepiglottic muscle. Owing to their distinct course and function, they are often referred to as the thyroepiglotticus (or thyroepiglottic muscle) and are sometimes described as a separate muscle.

Actions

Functionally, the thyroepiglottic part widens the laryngeal inlet by drawing the epiglottis and aryepiglottic folds laterally, particularly during inspiration. In this role, it acts antagonistically to the aryepiglottic muscle, facilitating airway opening and ensuring unobstructed airflow during breathing.

References

  • Gray, H. (2016) Gray’s Anatomy: The Anatomical Basis of Clinical Practice. 41st edn. Edited by S. Standring. New York: Elsevier. Chapter 35: Larynx, pp. 597.

  • Hoerter JE, Fakoya AO, Chandran SK. Anatomy, Head and Neck: Laryngeal Muscles. [Updated 2024 Jul 17]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK545265/

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