What are the four infrahyoid muscles?

What are the four infrahyoid muscles?

There are four strap muscles:

• thyrohyoid: deep and lateral.
• omohyoid: superficial and lateral.
• sternohyoid: superficial and medial.
• sternothyroid: deep and medial.

How many infrahyoid muscles are there?

The infrahyoid muscles are a group of four paired muscles that lie inferiorly to the hyoid bone in the anterior aspect of neck.

How many hyoid muscles are there?

Key points. There are eight hyoid muscles, four suprahyoid and four infrahyoid muscles. The suprahyoid muscles include digastric, stylohyoid, mylohyoid and geniohyoid. The infrahyoid muscles include omohyoid, sternohyoid, sternothyroid and thyrohyoid.

What are the thyroid muscles?

Sternothyroid muscle: This muscle extends from the oblique line of the thyroid cartilage to the sternum. This muscle contacts the anterior surface of the thyroid gland. Thyrohyoid muscle: The thyrohyoid muscle extends from the oblique line of the thyroid cartilage to the hyoid bone superiorly.

What are Infrahyoid and Suprahyoid muscles?

Suprahyoid muscles (those inserted superiorly on the hyoid bone) include the geniohyoid, mylohyoid, hypoglossus, stylohyoid, and digastric muscles. Infrahyoid muscles (those that insert inferiorly) include the sternohyoid, omohyoid, and sternothyroid muscles.

Which nerve Innervates 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 is the main function of infrahyoid muscles?

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.

Which muscles are considered Infrahyoid strap muscles?

Anterior muscles The thyrohyoid, sternohyoid, sternothyroid, and omohyoid muscles, also referred to as strap muscles, are part of the infrahyoid musculature. They insert on the inferior aspect of the hyoid bone and their contraction pulls the hyoid bone inferiorly.

What are the actions of the infrahyoid muscles?

What 4 muscles make up the suprahyoid muscles?

The suprahyoid muscles are four muscles located above the hyoid bone in the neck. They are the digastric, stylohyoid, geniohyoid, and mylohyoid muscles.

Which is not an Infrahyoid muscle?

The four infrahyoid muscles are the sternohyoid, sternothyroid, thyrohyoid and omohyoid muscles. The stylopharyngeus muscle is considered by many to be one of the strap muscles, but is not an infrahyoid muscle.

What are infrahyoid and Suprahyoid muscles?

Where are the infrahyoid muscles located in the body?

The infrahyoid muscles are a group of four muscles under the hyoid bone attaching to the sternum, larynx and scapula.

What are the names of the muscles in the neck?

Anatomical terms of muscle. [edit on Wikidata] The infrahyoid muscles (strap muscles) are a group of four pairs of muscles in the anterior (frontal) part of the neck. The four infrahyoid muscles are: the sternohyoid, sternothyroid, thyrohyoid and omohyoid muscles.

How are the infrahyoid muscles used in speech?

The infrahyoid muscles function to elevate and depress the hyoid bone and larynx during swallowing and speech. This moves the larynx as one unit. ^ a b cMcHanwell, Steve; Watson, Charles (1 January 2009).

What kind of surgery is performed on infrahyoid muscles?

Infrahyoid Muscles Paralysis. A common type of surgery in which the ansa cervicalis is often deliberately “sacrificed” is neck dissection. During that type of operation, which is indicated for malignant head and neck tumors, lymph nodes, fat tissue, muscles and even nerves and blood vessels are radically removed from the cervical region.