词条 | Superior thyroid artery | |||||||
释义 |
| Name = Superior thyroid artery | Latin = Arteria thyreoidea superior | Image = Plate 16 Zuckerkandl.jpg | Caption = Superficial dissection of the left side of the neck, showing the carotid and subclavian arteries. | Image2 = Gray562.png | Caption2 = The fascia and middle thyroid veins. (Superior thyroid artery labelled at upper left.) | BranchFrom = external carotid artery | BranchTo = Hyoid artery Sternocleidomastoid artery Superior laryngeal artery Cricothyroid artery | Vein = superior thyroid vein | Supplies = thyroid }} The superior thyroid artery arises from the external carotid artery just below the level of the greater cornu of the hyoid bone and ends in the thyroid gland. StructureFrom its origin under the anterior border of the sternocleidomastoid the superior thyroid artery 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 omohyoid, sternohyoid, and sternothyroid muscles. To its medial side are the inferior pharyngeal constrictor muscle and the external branch of the superior laryngeal nerve. BranchesIt distributes twigs to the adjacent muscles, and numerous branches to the thyroid gland, connecting with its fellow of the opposite side, and with the inferior thyroid arteries. The branches to the gland are generally two in number. One, the larger, supplies principally the anterior surface; on the isthmus of the gland it connects with the corresponding artery of the opposite side. A second branch descends on the posterior surface of the gland and anastomoses with the inferior thyroid artery. Besides the arteries distributed to the muscles and to the thyroid gland, the branches of the superior thyroid are:
Clinical significanceThis 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 ligate the artery at its origin at the external carotid artery. Furthermore, the external laryngeal branch of the superior laryngeal nerve courses in close proximity to the superior thyroid artery, making it at risk for injury during surgery. See also
Additional imagesReferences{{Gray's}}External links
3 : Arteries of the head and neck|Thyroid|Pharynx |
|||||||
随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识,基本涵盖了大多数领域的百科知识,是一部内容自由、开放的电子版国际百科全书。