The superior thyroid artery is a branch of the external carotid artery and supplies the larynx and thyroid gland.
What does superior thyroid supply?
The superior and inferior thyroid arteries supply the upper esophagus. The descending aorta and bronchial and right intercostal arteries supply the midesophagus, and the left gastric, left inferior phrenic, and splenic arteries supply the distal esophagus.
What does the superior thyroid artery do?
Together with the internal laryngeal nerve, it pierces the lateral thyrohyoid membrane, and supplies blood to the muscles, mucous membrane, and glands of the larynx, connecting with the branch from the opposite side. The cricothyroid artery may contribute to the supply of the larynx.
What does the superior laryngeal artery supply?
The superior laryngeal artery accompanies the internal laryngeal branch of the superior laryngeal nerve, beneath the thyrohyoid muscle. It pierces the thyrohyoid membrane, and supplies the muscles, mucous membrane, and glands of the larynx, anastomosing with the branch from the opposite side.
What does the inferior thyroid artery supply?
The inferior thyroid artery is considered the principal blood supplier of the thyroid gland. The ITA gives rise to the ascending cervical artery, the inferior laryngeal artery, and also gives pharyngeal, tracheal, and esophageal branches. Also of importance, the ITA supplies the four parathyroid glands.
What nerve runs with superior thyroid artery?
The external laryngeal nerve runs in close proximity to the origin of the superior thyroid artery in relation to the thyroid gland. The superior thyroid artery is clinically important in head and neck surgeries.
Where do you Ligate superior thyroid?
Most surgeons agree that identifying the SLN, in contrast to the RLN, is unnecessary. Instead, ligate the terminal branches of the superior thyroid artery as close to the thyroid capsule as possible to avoid damaging the nerve.
Why is middle thyroid ligated first?
To preserve blood supply to the parathyroid glands, the inferior thyroid artery should not be ligated laterally as a single trunk; rather, its branches should be ligated individually on the capsule of the lobe after they have supplied the parathyroid glands (see Fig.
Which gland is responsible for secreting TSH?
The hypothalamus and the pituitary gland, which are located in the brain, help control the thyroid gland. The hypothalamus releases thyrotropin-releasing hormone (TRH), which stimulates the pituitary gland to release thyroid-stimulating hormone (TSH).
What nerve runs with superior laryngeal artery?
It pierces the thyrohyoid membrane above the superior laryngeal artery. The other branch of the superior laryngeal nerve, the external laryngeal nerve, passes under sternothyroid deep to the superior thyroid artery. It supplies the cricothyroid and the inferior constrictor muscles.
Where does the superior laryngeal artery come from?
Description. The superior laryngeal artery is branch of the superior thyroid artery that accompanies the internal laryngeal branch of the superior laryngeal nerve, beneath the thyrohyoid muscle. This artery branches from the superior thyroid artery near its bifurcation from the external carotid artery.
What does the facial artery supply?
The facial artery supplies the palatine tonsils, soft palate, pterygoid, mylohyoid, and digastric muscles, the submandibular gland, and all of the face.
What does the superior laryngeal nerve do?
The superior laryngeal nerve, a branch of the vagus nerve, innervates the cricothyroid muscle of the larynx. This muscle stretches, tenses, and adducts the vocal cord.
What arteries supply thyroid gland?
The arterial supply to the thyroid gland is via two main arteries:
- Superior thyroid artery – arises as the first branch of the external carotid artery. …
- Inferior thyroid artery – arises from the thyrocervical trunk (a branch of the subclavian artery).
Where should the superior thyroid artery should be ligated during thyroidectomy?
Because of extreme variability of the inferior thyroid artery and the RLN, it is suggested that the artery be ligated either proximally or at its tertiary branches on thyroid capsule. The internal branch of the SLN is not potentially at risk during thyroidectomy unless the superior thyroid artery is ligated proximally.
Which artery begins with inferior thyroid?
The ascending cervical artery is a small branch which arises from the inferior thyroid artery as it passes behind the carotid sheath; it runs up on the anterior tubercles of the transverse processes of the cervical vertebrae in the interval between the anterior scalene muscle and the longus capitis.