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Muscles of the Face

Muscles of the Face. Muscles of Facial Expression All innervated by Facial Nerve [VII]. Orbicularis Oculi. Functions to close the eyelids Palpebral part: closes eyelids gently Orbital part: closes eyelids forcefully. Levator Anguli Oris.

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Muscles of the Face

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  1. Muscles of the Face • Muscles of Facial Expression • All innervated by Facial Nerve [VII]

  2. Orbicularis Oculi • Functions to close the eyelids • Palpebral part: closes eyelids gently • Orbital part: closes eyelids forcefully

  3. LevatorAnguliOris • Raises corner of mouth; helps form nasolabial furrow

  4. Depressor AnguliOris • Draws corner of mouth down and laterally

  5. LevatorLabiiSuperioris • Raises upper lip; helps form nasolabial furrow

  6. Depressor LabiiInferioris • Draws lower lip downward and laterally

  7. Zygomaticus Major • Draws corner of mouth upward and laterally

  8. Orbicularis Oris • Closes lips; protrudes lips

  9. Occipitofrontalis • Frontal belly: wrinkles forehead; raises eyebrows • Occipital belly: Draws scalp backward

  10. Frontalis

  11. Buccinator • Presses the cheeks against teeth; compresses distended cheeks

  12. Parotid Gland and Duct • Largest of 3 pairs of salivary glands in head • Facial nerve [VII], external carotid a., retromandibular v. pass through it. • Sensory innervation provided by auriculotemporal nerve (branch of mandibular nerve [V3]

  13. Parotid gland Largest salivary gland Irregular shape Superficial & deep parts Tough fascial sheath Investing fascia Painful with “mumps” CV VII only passes through

  14. Parotid duct Exits anterior surface of gland Accessory parotid along path of duct Crosses masseter Pierces buccinator Opens in oral vestibule opposite second upper molar

  15. Parotid Bed (structures deep to parotid) 1. Mastoid process • Styloidprocess & three muscles 3. Stylomastoid foramen (exit of CN VII) 4. Posterior belly of digastric 5. Carotid sheath

  16. Structures passing through parotid gland Facial nerve Retromandibular vein External carotid artery Superficial temporal and transverse facial Lymphatic vessels: superficial & deep parotid nodes (on sheath & within gland) Auriculotemporal nerve (carrying postganglionic parasympathetic fibers)

  17. Innervation to Parotid Sensory: great auricular & auriculotemporal Vasomotor: sympathetic fibers via the external carotid plexus; nerve cell bodies are located in the superior cervical ganglion Secretion: parasympathetic fibers (GVEp) from CN IX

  18. Innervation to Parotid CN IX Tympanic n Tympanic plexus Lesser petrosal Otic ganglion Auriculotemporal

  19. Parotid Gland

  20. Parotid Duct

  21. Nerves of the Face • Supraorbital • Infraorbital • Mental • Auriculotemporal • Facial • Temporal • Zygomatic • Buccal • Mandibular • Cervical

  22. Auriculotemporal Nerve • External acoustic meatus, surface of tympanic membrane, and large area of temple

  23. Facial Nerve [VII]

  24. Branches of Trigeminal [V]

  25. Divisions of Facial Nerve [VII]

  26. Arteries and Veins of the Face Retromandibular Vein

  27. Superficial Temporal Artery

  28. Superficial Temporal Vein

  29. Transverse Facial Artery

  30. External Carotid Artery

  31. Facial Artery & Vein

  32. Angular Artery & Vein

  33. Retromandibular Vein

  34. Internal Jugular Vein

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