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Year : 2018  |  Volume : 4  |  Issue : 2  |  Page : 55-57

A Rare Bilateral Variation of The Anterior Belly of Digastric Muscle

1 Assistant Professor, Department of Anatomy, IGIMS, Patna, India
2 Additional Professor, Department of Anatomy, IGIMS, Patna, India
3 Professor, Department of Anatomy, IGIMS, Patna, India

Correspondence Address:
Avanish Kumar
Additional Professor, Dept. of Anatomy, IGIMS, Patna, Bihar
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Source of Support: None, Conflict of Interest: None

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The digastric muscle is a suprahyoid muscle which consists of two bellies: anterior & posterior. Above the hyoid bone these two bellies are connected by an intermediate tendon, which is anchored to the hyoid bone by a fascial sling of investing layer of deep cervical fascia. The variations of the anterior belly of digastric muscle are uncommon. In the present case, we found a bilateral symmetric variation in the anterior bellies of digastric muscle in a 58 year old female cadaver. Both accessory bellies were present bilaterally medial to the anterior digastric muscles. Each accessory bellies consisted of two segments: anterior and posterior. Both segments crossed each other & looked like the letter "X". Both accessory bellies originated from the digastric fossa & inserted to the anterior digastric muscle. In the midline these accessory bellies were attached to each other by dense connective tissue that also connected these bellies to the mylohyoid muscle superiorly. Anatomical variations of the digastric muscle may affect the mastication as well as deglutition. Moreover, the accessory digastric muscles also affect the different diagnostic imaging and therapeutic procedures in the region of head and neck. Therefore this type of variations must be considered in procedures involving this area.

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