EXTERNAL CAROTID
- 114 Aortic arch
- Brachiocephalic trunk
- R. subclavian
- R. common Carotid art.
- Internal
- External
- L. Subclavian
- L. Carotid
- Internal
- External.
- Ascends behind the stylohyoid and posterior belly of the digastric & pass through Retromandibular fossa !
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ECCA Branches
- Anterior (3)
- Superior thyroid art. arises ventrally & descends to the anterior surface of the thyroid gland
- Sup. laryngeal artery larynx
- Ant., Post., & lateral branches S: Thyroid gland
- Infrahyoid, Sternocleidomastoid & cricothyroid branches S: sternocleidomastoid + infrahyoid muscles.
- hyoid bone Lingual art.
- before entering the tongue Sublingual art. S: sublingual gland & passes below it along the floor of the oral cavity.
- tongue Deep lingual art. Passes inside the tongue between the genioglossus and the inf. longitudinal muscle
- Facial art S: tonsils, palate + submandibular glands.
- medial (1) close to the neck of the mandible.
- Ascending pharyngeal art. - pharynx, + prevertebral muscles + middle ear
- Posterior (2)
- Occipital art. S: posterior region of the scalp
- Post. auricular ear, scalp + Parotid gland + facial nerve.
- terminal (2) gives 2 branches
- Superficial temporal
- Maxillary art.
Borders
Medially: Hyoid bone, wall of pharynx, superior laryngeal nerve, parotid gland
Laterally: Internal carotid artery, superior laryngeal nerve
Posterosuperiorly: Styloglossus muscle, stylopharyngeus muscle, glossopharyngeal nerve, pharyngeal branch of vagus nerve, parotid gland
Anteriorly: Skin, superficial fascia, platysma, deep cervical fascia, sternocleidomastoid muscle