The sternothyroid is a paired, flat strap of muscle that serves to fix the hyoid bone as well as depressing the larynx in phonation and in the terminal phase of swallowing .
What does the sternohyoid muscle attach to?
The sternohyoid muscle is a thin, narrow muscle attaching the hyoid bone to the sternum . It is one of the paired strap muscles of the infrahyoid muscles. It is supplied by the ansa cervicalis. It depresses the hyoid bone.
What does the Sternohyoid muscle do?
This group of muscles contains four main muscles: the omohyoid muscle
What muscles are superficial to sternohyoid?
The sternohyoid is a strap like infrahyoid muscle that connects the hyoid bone with the clavicle and sternum. Along with the omohyoid muscle, it comprises the superficial plane of infrahyoid muscles , while the sternothyroid and thyrohyoid belong to the deep layer.
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.
Why is it called the Sternothyroid muscle?
The sternothyroid arises from the posterior surface of the manubrium of the sternum , below the origin of the sternohyoid.
What is the smallest muscle in the human body?
Stapedius muscle is termed to be the smallest skeletal muscle in human body, which has a major role in otology. Stapedius muscle is one of the intratympanic muscles for the regulation of sound.
How do you stretch the Sternothyroid muscle?
Slowly move the ear toward the shoulder while the hands stay behind the back. Keep the shoulders down and the hands behind the back. Do not lift the shoulders up when tilting the head to the side. Hold the stretch for at least 20 seconds .
Why are they called strap muscles?
The name “strap muscles” comes from their long and flat shape, similar to a belt or strap 3 .
Is Sternocleidomastoid a muscle?
The sternocleidomastoid (SCM) muscle is located at the base of your skull on either side of your neck , behind your ears. On both sides of your neck, each muscle runs down the front of your neck and splits to attach to the top of your sternum and collarbone.
What type of muscle is sternocleidomastoid?
The sternocleidomastoid muscle is one of the largest and most superficial cervical muscles . The primary actions of the muscle are rotation of the head to the opposite side and flexion of the neck. The sternocleidomastoid is innervated by the accessory nerve.
What muscle stabilizes the hyoid?
Whenever the infrahyoid muscles stabilize the hyoid bone, then the suprahyoid muscles help in the depression of the mandible and thus help in wide opening of the mouth. The suprahyoid muscles participate in improving the flexion movement of the neck.
What is sternothyroid?
Medical Definition of sternothyroid
: an infrahyoid muscle on each side of the body below the sternohyoid that arises from the sternum and from the cartilage of the first and sometimes of the second ribs, inserts into the thyroid cartilage, and acts to draw the larynx downward by depressing the thyroid cartilage.
Is Sternohyoid a Infrahyoid muscle?
Anatomical terms of muscle
The infrahyoid muscles, or 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.
What are the 4 Infrahyoid muscles?
- thyrohyoid: deep and lateral.
- omohyoid: superficial and lateral.
- sternohyoid: superficial and medial.
- sternothyroid: deep and medial.
What do Suprahyoid muscles do?
The suprahyoid muscles are those above or superior to the hyoid bones of the neck. They elevate the hyoid bone when the mandible is fixed in place , and lower the mandible when the hyoid is held firm by muscles beneath it.
