What Innervates the thyrohyoid muscle?
The thyrohyoid muscles are innervated by a branch of the ventral ramus of C1 from the cervical plexus, which courses with the hypoglossal nerve. The nerve fibers are thus not from the hypoglossal nucleus.
What nerve Innervates the Infrahyoid muscles?
The ansa cervicalis (or ansa hypoglossi) is the union of the C1, C2, and C3 nerves from the cervical plexus, which provides innervation to the infrahyoid muscles (Figure 31.2).
What nerve supplies the strap muscles?
| Infrahyoid muscles | |
|---|---|
| Nerve | Ansa cervicalis |
| Actions | Depress the hyoid bone |
| Identifiers | |
| Latin | Musculi infrahyoidei |
What is the function of the sternohyoid muscle?
This group of muscles contains four main muscles: the omohyoid muscle, the sternohyoid muscle, the sternothyroid muscle, and the thyrohyoid muscle. The primary function of this group of muscles is to depress the hyoid bone during speech and swallowing.
What is the origin of the Sternohyoid muscle?
| Sternohyoid muscle | |
|---|---|
| Origin | manubrium of sternum |
| Insertion | hyoid bone |
| Artery | superior thyroid artery |
| Nerve | C1-C3 by a branch of ansa cervicalis |
What nerve Innervates the Geniohyoid?
The stylohyoid and posterior belly of digastric muscles’ nerve supply is by the facial nerve (VII cranial nerve). The first cervical nerve via the hypoglossal nerve innervates the geniohyoid muscle.
What arteries supply the infrahyoid muscles?
The upper attachments and superior parts of the infrahyoid muscles are supplied by arteries branching from the external carotid artery. The inferior portions of these muscles are supplied by arteries originating from the subclavian artery. muscles are supplied by the superior thyroid ar- tery (STA) and its branches.
What does sternohyoid muscle mean?
The sternohyoid is a strap like infrahyoid muscle that connects the hyoid bone with the clavicle and sternum. The function of this muscle is to reestablish the breathing process by pulling the hyoid bone and larynx inferiorly after deglutition. This article will discuss the anatomy of the sternohyoid muscle.
Which of the following muscles are superficial to sternohyoid?
There are four such muscles that are grouped into superficial and deep layers. The superficial layer includes sternohyoid and omohyoid, while the deep layer is made up of sternothyroid and thyrohyoid. The infrahyoid muscles are also part of a larger group called the extrinsic laryngeal muscles.
What bones form the origin and insertion of the sternohyoid muscle?
Origin and insertion Sternohyoid muscle originates from the upper posterior aspect of manubrium of sternum and the posterior surface of the medial end of clavicle . It extends superomedially and inserts to the inferior border of body of hyoid bone, where it adjoins the insertion of the contralateral sternohyoid muscle.
What muscles are superficial to sternohyoid?
What is the action of the sternohyoid muscle?
The action of the sternohyoid muscle is to depress the hyoid bone after it has been elevated by the suprahyoid muscles. The elevation of the hyoid bone and thus the larynx, happens during swallowing.
Where is the origin of the sternothyroid muscle?
Sternothyroid : Origin, Insertion, Action & Nerve Supply. Sternothyroid:The sternothyroid is a muscle in the neck.The sternothyroid muscle is wider and deeper than the sternohyoid. It is located within the deep plane.
Where does the blood supply for the sternohyoid come from?
Sternohyoid muscle is innervated by ansa cervicalis, a loop formed by the anterior rami of spinal nerves C1-C3 within the cervical plexus. Vascular supply to sternohyoid comes from the superior thyroid artery (a branch of the external carotid artery ), while the venous blood is conveyed by the superior thyroid vein.
Which is deeper the sternohyoid or the sternothyroid?
Sternothyroid:The sternothyroid is a muscle in the neck.The sternothyroid muscle is wider and deeper than the sternohyoid. It is located within the deep plane. Origin: Posterior surface of the manubrium below the origin of the sternohyoid m. Insertion: Arises from the manubrium of the sternum, and attaches to the thyroid cartilage.