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KMID : 1161920180150010012
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Journal of Medicine and Life Science
2018 Volume.15 No. 1 p.12 ~ p.15
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Positional relationship between the posterior belly of digastric and the stylohyoid variant
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Han Ji-Yong
Yoon Sang-Pil
Chang In-Youb
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Abstract
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Digastric and stylohyoid muscles are located in the suprahyoid region. There have been few studies about the general morphology of stylohyoid muscle and its relationship with digastric muscle. During routine educational dissection, unusual insertion of bilateral stylohyoid muscle was found in the cadaver of a 92-year-old Korean male, whose cause of death was ‘aspiration pneumonia’. Stylohyoid muscle arose from the styloid process, and inserted onto the intermediate tendon of digastric muscle and the hyoid bone on both sides. Each digastric muscle normally consists of an anterior belly, intermediate tendon and a posterior belly. In this cadaver, here were two anterior bellies on right side while one anterior belly was found on left side. Stylohyoid muscle ran medial to the intermediate tendon of digastric muscle on both sides. The anatomical relationship between stylohyoid and digastric muscles was reviewed based on morphological and embryological point of view.
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KEYWORD
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Stylohyoid, Digastric, Anatomical variant
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