Abstract
Occurrence of accessory bellies of anterior belly of digastric muscle (ABD) in the submental region is not uncommon. However reporting of different pattern of accessory bellies is of tremendous clinical significance for head and neck surgeons, radiologists and plastic surgeons. Herein we report a rare asymmetrical variant of ABD in the suprahyoid region. Accessory bellies were observed on either side of midline. On the right side accessory belly had two segments; one segment extended between the lower part of the ABD and hyoid bone, other one extended between the digastric fossa of mandible to the body of hyoid bone. On the left side accessory belly extended between mylohyoid muscle and to the lower part of the ABD.Bangladesh Journal of Medical Science Vol.16(3) 2017 p.461-463
Highlights
Digastric muscle is one of the suprahyoid muscles that consists of two bellies; anterior and posterior, connected by an intermediate tendon
The intermediate tendon is anchored to the hyoid bone by a fibrous pulley which is derived from investing layer of deep cervical fascia
Case report During regular dissection classes for the undergraduate medical students, we came across an anatomical variation in the submental region
Summary
Digastric muscle is one of the suprahyoid muscles that consists of two bellies; anterior and posterior, connected by an intermediate tendon. On the right side accessory belly had two segments; one of these segments extended from the lower part of the ABD close the intermediate tendon to the body of hyoid bone, other one extended between the digastric fossa of mandible to the body of hyoid bone.
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