An anomalous muscle clinging around the inferior belly of omohyoid muscle

We report an anomalous muscle in this area. The anomalous muscle took its origin from the posterior surface of the manubrium sterni and was inserted to the posterior surface of the clavicle. This muscle was 6  cm long and interestingly, it made a loop, which was clinging on to the inferior belly of omohyoid posteriorly, superiorly and anteriorly. The muscle was situated between the lower end of sternocleidomastoid and the carotid sheath. It was supplied by ansa cervicalis. Knowledge of this muscle could be useful in surgeries like removal of cervical rib, and cervical lymph node clearance. Hypertrophy of this muscle might compress the internal jugular vein.

Source: Anatomical Science International - March 27, 2022 Category: Anatomy Source Type: research