What is the superior belly of omohyoid muscle?
The superior belly of the omohyoid muscle forms the anteroinferior border of the carotid triangle vascular area, which houses the upper part of the common carotid artery, carotid sinus and carotid body.
What Innervates Superior belly of omohyoid?
superior root of ansa cervicalis
The superior belly of omohyoid muscle is innervated by the superior root of ansa cervicalis (C1), while the inferior belly receives fibers from spinal nerves C1, C2 and C3.
What is the action of the omohyoid muscle?
The omohyoid muscle is a muscle that depresses the hyoid. It is located in the front of the neck, and consists of two bellies separated by an intermediate tendon….
| Omohyoid muscle | |
|---|---|
| Nerve | Ansa cervicalis (C1-C3) |
| Actions | Depresses the larynx and hyoid bone. Also carries hyoid bone backward and to the side. |
| Identifiers |
Does omohyoid have two bellies?
Omohyoid (OH) muscle is one of the infrahyoid muscles that consist of superior and inferior bellies. The two bellies are continuous to each other at the intermediate tendon.
What nerve Innervates the M Omohyoideus?
ansa cervicalis
The omohyoid muscle is an infrahyoid muscle of the neck that is innervated by the ansa cervicalis of the cervical plexus receiving fibers from the ventral rami of C1–C3 spinal nerves.
What does the sternohyoid do?
Action. The sternohyoid muscle primarily depresses and fixes the hyoid bone and underlying larynx. Electromyographic studies have also demonstrated the muscle is involved in phonation by depressing the hyoid bone and underlying larynx.
What muscle depresses the thyroid cartilage?
| Thyrohyoid muscle | |
|---|---|
| Artery | superior thyroid artery |
| Nerve | hypoglossal nerve, first cervical nerve (C1) via hypoglossal nerve |
| Actions | elevates thyroid and depresses the hyoid bone |
| Identifiers |
What muscle depresses the hyoid bone?
Infrahyoid muscles: Together, the infrahyoid muscles play an active role in swallowing through the movement of the larynx. The omohyoid, sternohyoid, and thyrohyoid act to depress the hyoid bone. The thyrohyoid elevates the larynx whereas the sternothyroid depress the larynx.
What is the origin of the inferior belly of omohyoid muscle?
The inferior belly of omohyoid muscle originates from the superior border of the scapula, medial to the suprascapular notch. Some fibers may also arise from the transverse scapular ligament.
What are the characteristics of the omohyoid muscle?
Omohyoid muscle 1 Origin and insertion. The narrow flat omohyoid muscle consists of two bellies, an inferior and a superior belly, joined by an intermediate tendon; similar to the digastric muscle. 2 Relations. 3 Innervation. 4 Blood supply. 5 Function.
What is the function of the intermediate tendon of omohyoid?
The intermediate tendon of omohyoid is ensheathed by deep cervical fascia. This acts as a sling, binding the muscle to the inferiorly located clavicle and first rib, and helping the muscle to maintain its angulated pathway.
Where does the superior belly of omohyoid muscle fuse?
Further along its course towards the hyoid bone, the superior belly of omohyoid muscle converges with the sternohyoid muscle and inserts in close proximity to it. Occasionally, the superior belly can even be fused with the sternohyoid muscle and share a common attachment.