What muscles are around the thyroid?
The infrahyoid muscles and the sternocleidomastoid muscle directly border the thyroid gland. These muscles and other important muscles of note in the thyroid region are: Infrahyoid muscles: Together, the infrahyoid muscles play an active role in swallowing through the movement of the larynx.
What muscles are cut during thyroidectomy?
Background. Cutting the sternothyroid (ST) muscle is a useful technique to expose the superior pole of thyroid gland during thyroidectomy.
What muscles attach to thyroid cartilage?
It marks the upper lateral borders of the thyroid gland. Two muscles originate along the line, the thyrohyoid muscle and inferior pharyngeal constrictor. The sternothyroid inserts along the line.
What is thyrohyoid muscle?
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.
What are the infrahyoid muscles?
The infrahyoid muscles are a group of four paired muscles that lie inferiorly to the hyoid bone in the anterior aspect of neck. This group of muscles is also known as strap muscles. They connect hyoid, sternum, clavicle and scapula. Infrahyoid muscles are organised in two layers.
What is the Sternohyoid muscle?
As for the sternohyoid muscle, it is a flat muscle located on both sides of the neck. This muscle originated from the medial edge of the clavicle bone, sternoclavicular ligament, and posterior side of the manubrium. The sternohyoid muscle then ascends the neck and attaches to the body of the hyoid bone.
What are strap muscles of neck?
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 do you cut a muscle strap?
The strap muscles may need transection if the gland is large. The muscles should be cut as high as possible as the nerve supply to these muscles (ansa cervicalis) is in the lower third [1–3].
Which muscles are located anterior to the thyroid gland?
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 is strap neck?
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 is the digastric muscle?
The digastric muscle functions during swallowing, chewing, and speech. The anterior belly of the digastric is one of the three suprahyoid muscles which stabilizes the hyoid during swallowing, an action critical in protecting the airway while eating.