What supplies the sternohyoid muscle?
Nerve supply The sternohyoid muscles are innervated by the anterior rami of C1 – C3 (predominantly C2 and C3) through the ansa cervicalis of the cervical plexus.
What artery supplies infrahyoid muscles?
The arterial supply to the infrahyoid strap muscles originating from the superior thyroid artery (STA), the inferior thyroid artery (ITA), and the internal mammary artery (IMA), also called the internal thoracic artery, were investigated.
What does the sternohyoid muscle do?
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 does the thyrohyoid muscle do?
The thyrohyoid muscle is an infrahyoid muscle of the neck that is innervated by the ventral ramus of C1. The primary function of the thyrohyoid muscle is to depress and fix the hyoid bone and larynx though it may also raise the larynx when the hyoid bone is fixed.
Why is it called the Sternothyroid muscle?
The sternothyroid muscle, or sternothyroideus, is an infrahyoid muscle in the neck. It acts to depress the hyoid bone. It is below the sternohyoid muscle. It is shorter and wider than the sternohyoid….
|Superior thyroid artery
What is the Sternothyroid muscle?
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 are the 4 infrahyoid muscles?
There are four strap muscles:
- thyrohyoid: deep and lateral.
- omohyoid: superficial and lateral.
- sternohyoid: superficial and medial.
- sternothyroid: deep and medial.
What are the Infrahyoid muscle?
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 is the smallest and weakest muscle?
The stapedius is the smallest skeletal muscle in the human body. At just over one millimeter in length, its purpose is to stabilize the smallest bone in the body, the stapes….Stapedius muscle.
|Anatomical terms of muscle
What do muscle straps do?
The infrahyoid muscles or strap muscles are a group of four paired muscles in the anterior neck below the hyoid bone, within the muscular triangle. They are responsible for depressing the hyoid during swallowing. These muscles can be remembered by the mnemonic “TOSS”.
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.
What is the function of the sternohyoid muscle?
Sternohyoid muscle. The sternohyoid muscle is an infrahyoid muscle of the neck that is innervated by the ansa cervicalis of the cervical plexus receiving fibres from the ventral rami of C1-C3 spinal nerves. The sternohyoid is a paired, flat strap of muscle that serves to fix the hyoid bone as well as depressing the larynx in phonation…
Where does the muscle in the Sterno come from?
It is innervated by the ansa cervicalis. The muscle comes from the posterior border of the medial end out of the clavicle, the upper and posterior portions of the manubrium sterni and the posterior sternoclavicular ligament.
Where does the insertion of the sternothyroid take place?
Key facts about the sternothyroid muscle Origin Posterior surface of manubrium of sternu Insertion Oblique line of thyroid cartilage Action Depress the larynx Innervation Anterior rami of C1-3 (via the ansa cerv Blood supply Superior thyroid and lingual arteries