It extends nearly vertically superior-ward close to the lateral border of sternocleidomastoid muscle to insert at the inferior border of the body of hyoid bone (its site of insertion is lateral to that of the sternohyoid muscle).

It is anchored inferiorly to the clavicle and first rib by a band of deep cervical fascia that surrounds the intermediate tendon; this fascial fixation maintains the angle of the muscle.

[1] It is typically situated at the level of the arch of cricoid cartilage, adjacent to the internal jugular vein.

[2] The inferior belly is innervated by the ansa cervicalis itself (which is derived from cervical spinal nerves C1-C3), and the superior belly is innervated by the superior root of ansa cervicalis (which is derived from the first cervical spinal nerve (C1)).

[citation needed] The omohyoid muscle may be doubled or completely absent in some people.

[citation needed] This article incorporates text in the public domain from page 392 of the 20th edition of Gray's Anatomy (1918)