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Muscle Origin Insertion Action Nerve
levator palpebrae superioris CS AN Levator Palpebrae Superioris_Lat lesser wing of sphenoid bone (anterior surface) upper eyelid (fascia & skin) elevates upper eyelid oculomotor nerve (CN III)
buccinator CS AN Buccinator maxilla & mandible (posterior alveolar process of both bones); pterygomandibular raphe modiolus (just lateral to the angle of the mouth compresses cheek(s) facial nerve (CN VII)
corrugator supercilii CS AN Corrigator Supercili frontal bone just above nose (lateral to glabella) skin of medial portion of eyebrows draws eyebrows downward & medially ("thinker's brow") facial nerve (CN VII) (zygomatic branch)
depressor anguli oris CS AN Depressor Anguli along oblique line of mandible; lateral aspect of mental tubercle of mandible modiolus (near angle of mouth) depresses angle(s) of mouth (frown) facial nerve (CN VII)
depressor labii inferioris CS AN Depressor Labii Inferioris mandible (between symphysis & mental foramen) skin & fascia of lower lip draws lower lip downward & laterally; everts lower lip facial nerve (CN VII)
depressor septi nasi CS AN Depressor Septi incisive fossa of maxilla septum & alar cartilage of nose constricts notrils facial nerve (CN VII)
frontalis CS AN Occipitofrontalis_With Eye and Ear galea aponeurotica skin & fascia above nose & eyes draws scalp posteriorly to raise eyebrows & wrinkle brow (surprise) facial nerve (CN VII), temporal branch of
levator anguli oris CS AN Levator Anguli Oris below infraorbital foramen of maxilla modiolus (near angle of mouth) elevates angle(s) of mouth (smiling) facial nerve (CN VII)
levator labii superioris CS AN Levator Labii Superioris medial inferior orbital margin of maxilla upper lip muscles elevates upper lip; everts upper lip facial nerve (CN VII)
levator labii superioris alaeque nasi CS AN Levator Aleque Nasi frontal process of maxilla lateral slip: upper lip muscles; medial slip: alar cartilage of nose elevates upper lip; flares nostrils; everts upper lip facial nerve (CN VII)
mentalis CS AN Mentalis incisive fossa of mandible skin & fascia of chin elevation of lower lip; everts lower lip; wrinkles skin of chin facial nerve (CN VII)
nasalis CS AN Nasalis transverse part: maxilla (lateral to nose); alar part: maxilla, superior to canine alveolar process transverse part: opposite side nasalis over upper cartilage of nose; alar part: alar cartilage of nose (nasal wing) flares nostrils (particularly in forced respiration) facial nerve (CN VII)
occipitalis CS AN Occipitofrontalis_With Eye and Ear lateral 2/3 of superior nuchal line & EOP galea aponeurotica draws back scalp to raise eyebrows & wrinkle brow (surprise) facial nerve (CN VII), posterior auricular branch
orbicularis oculi CS AN Orbicularis Occuli orbital portion: nasal process of frontal bone; palpebral portion: palpebral ligament; lacrimal portion: lacrimal crest of lacrimal bone circumferentially around orbit meeting at the origin closes eye tightly, squinting of the eye; depresses upper eye lid, elevates lower eyelid (palpebral part) facial nerve (CN VII) (zygomatic branch)
orbicularis oris CS AN Orbicularis Oris modiolus (just lateral to angle of mouth) circumferentially around mouth; blends with other muscles closes mouth; protrudes lips (puckering of lips) facial nerve (CN VII)
platysma CS AN Platysma subcutaneous fascia (over deltoid-pectoral region) mandible & subcutaneous fascia of lower face tenses skin over lower neck (creates ridge in skin); depress mandible & lower lip facial nerve (CN VII)
procerus CS AN Procerus nasal bone & cartilages Skin & fascia between eyebrows draws medial eyebrow downward (menacing expression); wrinkles skin of superior nose facial nerve ( CN VII) (superior buccal branches)
risorius CS AN Risorius   parotid fascia (superficial to masseter) modiolus (near angle of mouth) draws angle of mouth laterally (false smile) facial nerve (CN VII)
zygomaticus major CS AN Zygomaticus Major zygomatic bone (anterior to zygomatic-temporal suture) modiolus (near angle of mouth) elevates angle of mouth (smiling); pulls angle of mouth laterally facial nerve (CN VII)
zygomaticus minor CS AN Zygomaticus Minor zygomatic bone (posterior to zygomaticmaxillary suture) skin, fascia & muscles of upper lip elevates upper lip (smile); everts upper lip facial nerve (CN VII)
        The jaws are opened by the lateral pterygoid muscle & are closed by the temporalis, masseter, & medial pterygoid.
Muscle Origin Insertion Action Nerve
Lateral pterygoid CS AN Pterygoid_Lat superior head: greater wing of sphenoid; inferior head: lateral surface of lateral pterygoid plate superior head: capsule & articular disc of TMJ; inferior head: neck of mandibular condyle protraction of the mandible; lateral deviation of mandible to side opposite of contraction (during chewing) trigeminal nerve (CN V)
Masseter CS AN Masseter superficial part: zygomatic process of maxilla; inferior border of zygomatic arch; deep part: posterior aspect of inferior border of zygomatic arch superficial part: angle & ramus of mandible; deep part: superior ramus & coronoid process of mandible elevation of mandible (clenches teeth); protraction of mandible; retraction of mandible trigeminal nerve (CN V)
Medial pterygoid CS AN Pterygoid_Med medial surface of lateral pterygoid plate of sphenoid; palatine bone & pterygoid fossa inner surface of mandibular ramus & angle of mandible elevation of mandible (clenches teeth); protraction of mandible; lateral deviation of mandible trigeminal nerve (CN V)
Temporalis CS AN Temporalis temporal fossa coronoid process & ramus of mandible elevation of mandible; retraction of mandible (posterior fibers) trigeminal nerve (CN V) (mandibular branch)
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These muscle tables are often slightly different than those found in the muscle manual and other texts to allow students learning to realize there are subtle differences in anatomical variation and nomenclature ultimate allowing you to be more aware of real life presentation – after 15 years and over 400 cadaver dissections this author is always amazed at the differences found in the human body every time we are in the cadaver lab – all text books and videos are only accurate to a point!