Journal Article 顎二腹筋の外側を通る外頸動脈の一例
A case of external carotid artery lateral to the digastric muscle

田所, 治  ,  春日, 美理依  ,  前田, 信吾  ,  奥村, 雅代  ,  金銅, 英二  ,  矢ヶ﨑, 裕  ,  TADOKORO, OSAMU  ,  KASUGA, MIRII  ,  MAEDA, SHINGO  ,  OKUMURA, MASAYO  ,  KONDO, EIJI  ,  YAGASAKI, HIROSHI

41 ( 1 )  , pp.47 - 53 , 2015-06-30 , 松本歯科大学学会
An external carotid artery lateral to the posterior belly of the digastric, classified as type IV, was found on the right side of a ₇4–year–old male cadaver during a student dissection practice. The external carotid artery bifurcated from the common carotid artery at the level of the upper border of the hyoid bone. The artery gave rise to the superior thyroid artery, linguofacial trunk, and occipital artery, and ran lateral to the digastric. A long styloid process was found and the stylohyoid descended from it to the hyoid bone. The intermediate tendon of the digastric was deep in relation to the stylohyoid. The external carotid artery on the left side bifurcated from the common carotid artery at a level higher than on the right side. The thyroid–linguofacial trunk bifurcated from the level lower than bifurcation of the common carotid artery. The external carotid artery was lateral to the stylohyoid. An embryological consideration of the course of the type IV external carotid artery in the present case is described.

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