Superior thyroid artery
|Artery: Superior thyroid artery|
Superficial dissection of the left side of the neck, showing the carotid and subclavian arteries.
The fascia and middle thyroid veins. (Superior thyroid artery labelled at upper left.)
|Latin||Arteria thyreoidea superior|
|Source||external carotid artery|
|Branches||Hyoid (infrahyoid) artery
Superior laryngeal artery
|Vein||superior thyroid vein|
From its origin under the anterior border of the Sternocleidomastoideus it runs upward and forward for a short distance in the carotid triangle, where it is covered by the skin, Platysma, and fascia; it then arches downward beneath the Omohyoideus, Sternohyoideus, and Sternothyreoideus.
It distributes twigs to the adjacent muscles, and numerous branches to the thyroid gland, anastomosing with its fellow of the opposite side, and with the inferior thyroid arteries.
The branches to the gland are generally two in number;
Besides the arteries distributed to the muscles and to the thyroid gland, the branches of the superior thyroid are:
This artery must be ligated at the thyroid when conducting a thyroidectomy. If the artery is severed, but not ligated, it will bleed profusely. In order to gain control of the bleeding the surgeon may need to extend the original incision laterally to gain access to its origin from the external carotid artery and ligate it there.
- Anatomy figure: 26:02-02 at Human Anatomy Online, SUNY Downstate Medical Center
- Superior+thyroid+artery at eMedicine Dictionary
- lesson5 at The Anatomy Lesson by Wesley Norman (Georgetown University) (antthyroidgland)