Morphological Variations of the Human Interarytenoid Muscle

Shin Hyo Lee (이신효); SHIN KANG JAE (신강재)

doi:10.11637/aba.2023.36.4.139

Morphological Variations of the Human Interarytenoid Muscle

Anatomy & Biological Anthropology
Abbr : Anat Biol Anthropol
2023, 36(4), pp.139~146
DOI : 10.11637/aba.2023.36.4.139
Publisher : 대한체질인류학회
Research Area : Medicine and Pharmacy > Anatomy
Received : October 4, 2023
Accepted : November 24, 2023
Published : December 31, 2023

Shin Hyo Lee ¹, SHIN KANG JAE ²

¹원광대학교
²동아대학교

Accredited

ABSTRACT

This study investigated morphological variations of the transverse and oblique bellies of the interarytenoid muscle and their microstructures in humans. Forty-seven larynges from 50 formalin-embalmed cadavers were dissected to expose the arrangement of muscle fibers of the interarytenoid muscle. Histological sections of the laryngeal frame including the arytenoid cartilage and adjacent connective tissues were observed in three larynges. Forty larynges(85%) showed the typical morphology with superficial oblique and deep transverse bellies of the interarytenoid muscle. The boundaries of the oblique and transverse bellies of the interarytenoid muscle were atypical in the other seven cases (15%). In one case, a muscle belly originated from the cricoid cartilage medial to the posterior cricoarytenoid muscle and caused a height discrepancy of the arytenoid cartilage. Histological observations revealed that most of the muscle bellies of the transverse arytenoid muscle inserted to the muscular process of the arytenoid cartilage, whereas some muscle fascicles dispersed into the connective tissues of the lateral laryngeal frame. Occasionally, accessory muscle bellies vertically arose deep to the transverse arytenoid muscle. The results of this study will contribute to advance relevant anatomical knowledge for accurate diagnosis and treatment planning of laryngeal disorder such as dysphonia.

KEYWORDS

Anatomy, Histology, Laryngeal muscle, Vocal cords

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* References for papers published after 2023 are currently being built.

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Anatomy & Biological Anthropology 2023 KCI Impact Factor : 0.33

Morphological Variations of the Human Interarytenoid Muscle

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* References for papers published after 2023 are currently being built.

Anatomy & Biological Anthropology 2023 KCI Impact Factor : 0.33

Morphological Variations of the Human Interarytenoid Muscle

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