Anatomic Variation of the Anterior Belly of Digastric Muscle and Positional Relationship between the Posterior Belly of Digastric and Stylohyoid Muscle (두힘살근 앞힘살의 형태변이와 두힘살근 뒤힘살과 붓목뿔근 사이의 위치 관계)

Da-Hye Kim (김다혜); 도형주; 김현주; 원성윤; Choi da ye (최다예); Kyung-Seok HU (허경석); Jong Hoon Choi (최종훈); 김희진

doi:10.11637/aba.2010.23.1.9

Anatomic Variation of the Anterior Belly of Digastric Muscle and Positional Relationship between the Posterior Belly of Digastric and Stylohyoid Muscle

Anatomy & Biological Anthropology
Abbr : Anat Biol Anthropol
2010, 23(1), pp.9~16
DOI : 10.11637/aba.2010.23.1.9
Publisher : 대한체질인류학회
Research Area : Medicine and Pharmacy > Anatomy

Da-Hye Kim ¹, 도형주 ², 김현주 ³, 원성윤 ³, Choi da ye ¹, Kyung-Seok HU ¹, Jong Hoon Choi ¹, 김희진 ¹

¹연세대학교
²연세대학교 치과대학 구강내과학교실
³연세대학교 치과대학 해부학교실

Accredited

ABSTRACT

The digastric muscle is located in the suprahyoid region which consists of anterior belly, intermediate tendon and posterior belly. This muscle is an important landmark when performing an operation of submental and upper neck region. Previous researches have reported about variations of the anterior and posterior belly of digastric muscle. However,there are few studies about the general morphology of the digastric muscle and the relationship with surrounding muscles. The purpose of this study was to analyze the morphology of the anterior belly of digastric muscle and confirm the topographic relationship between the digastric muscle and the stylohyoid muscle of Korean. Thirty-four cadavers (21 males, 13 females; mean age 65 years; range 24~89 years) were used in this study. The skin, subcutaneous tissues, superficial fascia and platysma were removed and a detailed dissection was performed, with extreme care being taken not to damage underlying the muscles of submental and upper neck region. After the dissections,all specimens were sketched and photographed. In 8 specimens, we observed the accessory bellies of the anterior belly of digastric muscle. We classified the accessory bellies into the crossover type (five specimens, 14.7%) that cross the mandibular raphe and unilateral type (three specimens, 8.82%). The findings resulting from observation of the anatomical relationship between the posterior belly of digastric and stylohyoid muscles, the posterior belly of digastric muscle perforated the stylohyoid muscle in 32 cases (65%) out of 49sides. This case was subdivided into the belly of the stylohyoid muscle lean to the lateral (twenty-one specimens,42.9%) or medial side (eleven specimens, 22.4%) of the posterior belly of digastric muscle. In 17 specimens (35%), the stylohyoid muscle existed on the medial side of the posterior belly of digastric muscle.

KEYWORDS

Anterior belly of digastric muscle, Accessory belly, Posterior belly of digastric muscle, Stylohyoid muscle

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Anatomy & Biological Anthropology 2023 KCI Impact Factor : 0.33

Anatomic Variation of the Anterior Belly of Digastric Muscle and Positional Relationship between the Posterior Belly of Digastric and Stylohyoid Muscle

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

Anatomy & Biological Anthropology 2023 KCI Impact Factor : 0.33

Anatomic Variation of the Anterior Belly of Digastric Muscle and Positional Relationship between the Posterior Belly of Digastric and Stylohyoid Muscle

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KEYWORDS

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