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Superficial Face & Scalp Neck Platysma In superficial fascia of neck O: jaw and lateral angle of mouth I: across clavicle & across upper thorax Cheeks Buccinator O: alveolar processes (from Moore) of maxilla & mandible I: orbicularis oris Mouth Orbicularis Oris Depressor Anguli Oris Mentalis Zygomaticus Major Levator Labii Superioris Buccinator (from notes) Nose Nasalis Cervical branch of Facial Nerve (CN 7) No real action; wrinkles skin of neck & opens moutb Facial artery of external common carotid (of common carotid) Buccal branch of Facial Nerve (CN 7) Aids mastication and swallowing by pressing cheeks against molar teeth during chewing; also used during whistling & sucking by forcing cheeks against teeth Facial artery Spinctner muscle surrounding mouth Upper: Buccal branches of Facial Nerve (CN 7) Lower: Mandibular branch of Facial Nerve (CN 7) Facial artery O: body of mandible I: into corner of mouth into orbicularis oris O: mandible I: into chin Mandibular branch of Facial Nerve (CN 7) Closes, protrudes, compresses lips against teeth; “kiss”; “whistle”; plays an important role in articulation & mastication (chewing) Depresses corner of mouth; “frown” Facial artery O: zygomatic bone I: corner of mouth O:maxilla I: skin on lateral half of upper lip Forms muscular part of cheek & lateral wall of oral cavity O: posterior maxilla, upper medial mandible & pterygomandibular raphae I: orbicularis oris in both upper and lower lips Zygomatic branch of Facial Nerve (CN 7) Buccal branch of Facial Nerve (CN 7) Draws lower lip up over lower teeth; “pout”; raises skin of chin during expression of doubt Draws corner of mouth up; “smile” Raises upper lip carrying it a little forward; “smile” Compress cheeks so that the food being chewed can be pushed toward teeth Transverse (compressor naris): & alar (dilator naris) Buccal branch of Facial Nerve (CN 7) Primary muscle of nose; Compressor naris: compresses the anterior nasal aperature“wrinkle nose” Dilator naris: Facial artery Mandibular branch of Facial Nerve (CN 7) Buccal branch of Facial Nerve (CN 7) Facial artery Facial artery Facial artery Facial artery widens the anterior nasal aperture “flares nostrils” & draws nostril down as in anger Eyes Orbicularis Oculi Levator Palpebrae Superiorus Superior Tarsal (smooth muscle) Palpebral part: O: medial palpebral ligament (contained in eyelid) Orbital part: O: frontal & maxilla bones (encircles orbit) Zygomatic branch of Facial Nerve (CN 7) O: sphenoid bone I: superior tarsal plate This muscle is not in notes. But, it was discussed in lecture Cranial Nerve III (oculomotor nerve) Sphincter muscle of eye; contraction narrows eye opening & encourages the flow of tears by helping to empty the lacrimal sac. Orbital part (close eyes to protect against glare of light & dust in air) Palpebral part (Close eyelids lightly to keep cornea from drying) Lacrimal part (draw eyelids and macrimal puncta medially); Aids spreading of tears by holding eyelids close to eyeballs; wrinkle skin around eye “look upward” Facial artery Facial artery “scared eye look” Scalp Epicranialis= Occipitofrontalis (frontalis + occipitalis) connected by aponeurosis epicranialis/galea aponeurosis Frontalis Wraps over forehead Temporal branches Elevates eyebrows, ? branch of the to attach into of Facial Nerve (CN “surprised look”; external carotid orbicularis oculi; 7) produces transverse No bony attachments wrinkles in forehead when one frowns Occipitalis O: occipital bone Posterior auricular Occipital artery of (continues over skull branches of Facial external carotid as aponeurosis) Nerve (CN 7)