Presentation on theme: "Vessels and nerves of the face: Part of the head and neck file. Dr. Samsam Pictures from: Platzer atlas and textbook of human anatomy."— Presentation transcript:
Vessels and nerves of the face: Part of the head and neck file. Dr. Samsam Pictures from: Platzer atlas and textbook of human anatomy
Hypoglossal nerve External Carotid A. Common Carotid A. internal Jugular V. Vagus N. Subclavian A. Brachial plexus Common facial V. internal Jugular V. Superior cervical sympathetic ganglion internal Jugular V. Big vessels in the neck:
Anterior Facial Regions: First of all, the blood supply of the face is mostly by ext. carotid and partly by int. carotid. Facial artery (2) from ext. carotid passes it anastomose with dorsal nasal A. (4) coming from Ophthalmic A. Forehead is supplied by supratrochlear A. (8) and supraorbital (9) A., both from ophthalmic A. Facial vein (10) anastomoses via Angular vein (11) With dorsal nasal vein. ***This anastomoses is extremely important since this allows a direct connection to Cavernous sinus, through which, infections eg: from a furuncle on the lip, may get into skull. All mimetic muscles are innervated by branches of facial N: 13- temporal branch, 14- zygomatic 15- buccal branch and 16- marginal mandibular.
Anterior Facial Regions: Sensory innervation to the face: Is derived from branches of Trigeminal (V) nerve : Ophthalmic (V/1), Maxillary (V/2) and mandibular (V/3) nerves. Ophthalmic nerve: supplies the forehead: Supratrochlear N (17) and supraorbital (18). Maxillary nerve: supplies lower eyelid, Cheek, lateral nasal, upper lip and anterior Temporal regions by Infraorbital N. (22). Mandibular N: lower lip over mandible (not angle) and chin by mental N (23). Auriculotemporal N (24) supplies skin on Mandible ramus, concha of auricle and Most part of ext. layer of tympanic memb. Sensitivity of the 3 branches of trigeminal N can be tested by pressing nerves 18, 22 and 23. This is a vertical line, 2-3 cm lateral to midline. ***Trigeminal Neuralgia.
Trigeminal neuralgia (Tic Douloureux) A disorder of unknown etiology (cause) associated with intractable pain along the 3 branches of trigeminal nerve but especially along maxillary and mandibular nerves. A simple trigger such as touch, cold or hot can start the pain. Therapy: Carbamazepine, radiofrequency destruction of the branches involved. Alcohol or Glycerin injection around the trigeminal ganglion. Transection of the sensory root. Vascular decompression of the trigeminal ganglion.