External Carotid Artery скачать в хорошем качестве

External Carotid Artery

External Carotid Artery Course & Relations The external carotid artery begins in the carotid triangle at the level of the upper border of the thyroid cartilage opposite the disc between the third and fourth cervical vertebrae. It runs upwards and slightly backwards and laterally, and terminates behind the neck of the mandible by dividing into the maxillary and superficial temporal arteries. The external carotid artery has a slightly curved course, so that it is anteromedial to the internal carotid artery in its lower part, and anterolateral to the internal carotid artery in its upper part. ln the carotid triangle, the external carotid artery is comparatively superficial, and lies under cover of the anterior border of the sternocleidomastoid. The artery is crossed superficially by the cervical branch of the facial nerve, the hypoglossal nerve, and the facial, lingual and superior thyroid veins. Deep to the artery, there are: a. The wall of the pharynx. b. The superior laryngeal nerve which divides into the external and internal laryngeal nerves. c. The ascending pharyngeal artery Above the carotid triangle, the external carotid artery lies deep in the substance of the parotid gland. Within the gland, it is related superficially to the retromandibular vein and the facial nerve Deep to the external carotid artery, there are: a. The internal carotid artery. b. Structures passing between the external and internal carotid arteries; these being styloglossus, stylopharyngeus, IX nerve, pharyngeal branch of X, and styloid process. c. Two structures deep to the internal carotid artery, namely the superior laryngeal nerve and the superior cervical sympathetic ganglion Branches The external carotid artery gives off eight branches which may be grouped as follows. Anterior 1. Superior thyroid 2. Lingual 3. Facial Posterior 1. Occipital 2. Posterior auricular. Medial 1. Ascending pharyngeal Terminal 1. Maxillary 2. Superficial temporal ---------------------------------------------------------------------------------------------------------------- My website - https://human-anatomy-lessons.busines... ---------------------------------------------------------------------------------------------------------------- Follow me in blogspot - https://human-anatomylessons.blogspot... _________________________________________________________________________________________________________________ Visit my blogs - https://humananatomyonline.in/ Contact me @ https://t.me/humananatomylessons