Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Summary of Anterior Cervical Triangle Boundaries: Mandible, SCM, midline M1 – Anatomy Divided into 4 triangles: Muscular, carotid, submandibular, submental Root of the Neck Muscular: infrahyoid muscles innervated by ansa cervicalis EXCEPT thyrohyoid (C1) Dr. Jeff Dupree Carotid: carotid sheath, ansa cervicalis, branches of ext. carotid, hypoglossal n., deep cervical lymph nodes Submandibular: submandibular gland, suprahyoid muscles Submental: crosses midline, submental lymph nodes 1 2 3 4 Summary of Posterior Cervical Triangle 2 triangles: occipital supraclavicular Occipital: 4 cutaneous nerves lesser occipital, great auricular, transverse cervical, supraclavicular spinal accessory Nerves of the Muscular Triangle Boundaries of Root of Neck Anterior: manubrium of sternum Lateral: 1st rib Posterior: body of 1st thoracic vertebra 5 6 Posterior to Anterior Scalene M. Anterior to Anterior Scalene M. 7 8 Muscles of the root of the neck Arteries of the Root of Neck Longus colli Brachiocephalic trunk (right side) Scalenes anterior middle Common carotid Subclavian posterior 9 10 Subclavian Artery Blood Supply for Root of Neck Three parts: 1st part: 2nd part: 3rd part: Common carotid a. origin to medial border of Anterior Scalene behind Anterior Scalene lateral edge of Ant. Scalene to 1st rib Subclavian a. -3 parts Branches of 1st part: -vertebral -internal thoracic -thyrocervical trunk Branches of 2nd part: -costocervical trunk 11 Branch of 3rd part: -dorsal scapular 12 Relationship between Ant. Scalene and Subclavian Branches Vertebral Thyrocervical Costocervical Int. Thoracic (not seen) 13 14 Subclavian Artery Internal thoracic Vertebral Thyrocervical Thyrocervical trunk: transverse cervical suprascapular inferior thyroid ascending cervical Costocervical trunk: deep cervical superior (supreme) intercostal the superior/highest/supreme intercostal artery are all accepted names for this artery; the confusion concerns the veins of the same names; the supreme intercostal vein drains the first intercostal space and then empties into the brachiocephalic while the superior/highest intercostal vein drains 15 the 2nd intercostal space 16 Venous drainage of Root of Neck Costocervical Brachiocephalic vv Internal jugular v. Subclavian v. Thyroid vv. 17 18 Cervical Sympathetic Trunk and Ganglia Nerves in the Root of the Neck -lies on the longus colli m. -ganglia -superior (C2) -middle (C6) -inferior (C7, behind subclavian) Phrenic Vagus Brachial plexus -inferior and middle are connected by ansa subclavia -vertebral ganglion -Stellate ganglion 19 20 Thyroid Gland Thyroid Gland -3 lobes + isthmus (2nd-3rd tracheal ring) -pyramidal lobe- remnant of thyroglossal duct -inf./sup. thyroid a -inf/mid/sup thyroid v -regulates metabolism -thyroidea ima 21 22 Esophagus Parathyroid Glands -continuous with pharynx -posterior to trachea -posterior surface -4 glands Trachea -blood supply from inferior thyroid a -below larynx -c-shaped cartilage -covered ant. infrahyoid m isthmus of thyroid inferior thyroid v pretracheal nodes -regulate Ca+ 23 tracheostomy 24 Thoracic Duct -enters neck to left of midline -union of internal jug and left subclavian 25 27 26