Адам мойын бұлшық еті: Омогиоид бұлшығының құрылысы мен қызметі

Human neck muscle
The omohyoid muscle is a muscle in the neck. It is one of the infrahyoid muscles. It consists of two bellies separated by an intermediate tendon. Its inferior belly is attached to the scapula; its superior belly is attached to the hyoid bone. Its intermediate tendon is anchored to the clavicle and first rib by a fascial sling. The omohyoid is innervated by the ansa cervicalis of the cervical plexus. It acts to depress the hyoid bone.

The omohyoid muscle consists of muscle bellies that meet at an angle at the muscle's intermediate tendon.

The inferior belly is narrow and flat band. 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)). Its superior belly divides the anterior triangle into an carotid triangle (above) and a muscular triangle (below). Its superior belly serves as the most lateral member of the infrahyoid muscles, located lateral to both the sternothyroid muscles and the thyrohyoid muscles. The tendon is related to the internal jugular vein and can be used as a landmark for this vein during surgery.

The omohyoid muscle may be doubled or completely absent in some people. Either belly may be doubled or absent. The inferior belly may be attached to the clavicle directly (rather than by fascia). The superior belly may be fused with the sternohyoid muscle.

The muscle depresses the hyoid bone when the bone is in an elevated position. A putative action of the muscle is tension of the inferior portion of deep cervical fascia to prevent soft tissues from collapsing inward into the upper airway during deep inspiration.

The name "omohyoid" derives from the Greek "omos" meaning shoulder, giving one of its attachments, and "hyoid", giving the other attachment – the hyoid bone.