The Omohyoid
The omohyoid muscle is a thin, ribbon-like muscle located in the neck's anterior (front) part. It consists of two bellies, the superior belly and the inferior belly, which are connected by an intermediate tendon. The superior belly of the omohyoid muscle originates from the superior border of the scapula (shoulder blade). In contrast, the inferior belly originates from the intermediate tendon and inserts onto the hyoid bone, a small U-shaped bone located in the neck. The omohyoid muscle is responsible for several movements of the hyoid bone and the larynx, including depression of the hyoid bone during swallowing and speaking and stabilization of the larynx during breathing. The muscle also maintains posture and stabilizes the neck during various activities, such as lifting or carrying. The ansa cervicalis innervate the omohyoid muscle. This nerve loop arises from the cervical spinal nerves (C1-C3), and works in conjunction with other muscles of the neck and shoulder girdle to produce efficient movements during various activities. Dysfunction or weakness of the omohyoid muscle can lead to difficulties swallowing, and speaking, and postural imbalances in the neck and shoulder region.