FACIAL EXPRESSION Flashcards
(20 cards)
Levator Palpabrae Superioris
O: lesser wing of sphenoid bone (anterior surface)
I: upper eyelid (fascia & skin)
N: Oculomotor Nerve (CN III)
A: elevates upper eyelid
Buccinator
O: maxilla & mandible (posterior alveolar process of both bones); pterygomandibular raphe
I: modiolus (just lateral to the angle of the mouth)
N: facial nerve (CN VII)
A: compresses cheeks
Corrugator Supercilii
O: frontal bone just above nose (lateral to glabella)
I: skin of medial portion of eyebrows
N: facial nerve (CN VII); zygomatic branch
A: draws eyebrows downward & medially (thinker’s brow)
Depressor Anguli Oris
O: along oblique line of mandible; lateral aspect of mental tubercle of mandible
I: modiolus (near angle of mouth)
N: facial nerve (CN VII)
A: depresses angles of mouth (frown)
Depressor Labii Inferioris
O: mandible (between symphysis and mental foramen)
I: skin & fascia of lower lip
N: facial nerve (CN VII)
A: draws lower lip downward & laterally; everts lower lip
Depressor Septi Nasi
O: incisive fossa of maxilla
I: septum & alar cartilage of nose
N: facial nerve (CN VII)
A: constricts nostrils
Frontalis
O: galea aponeurotica
I: skin & fascia above nose & eyes
N: facial nerve (CN VII)
A: draws scalp posteriorly to raise eyebrows & wrinkle brow (surprise)
Levator Anguli Oris
O: below infraorbital foramen of maxilla
I: modiolus (near angle of mouth)
N: facial nerve (CN VII)
A: elevates angle of mouth (smiling)
Levator Labii Superioris
O: medial inferior orbital margin of maxilla
I: upper lip muscles
N: facial nerve (CN VII)
A: elevates upper lip; everts upper lip
Levator Labii Superioris Alaeque Nasi
O: frontal process of maxilla
I: lateral slip: upper lip muscles; medial slip: alar cartilage of nose
N: facial nerve (CN VII)
A: elevates upper lip; flares nostrils; everts upper lip
Mentalis
O: incisive fossa of mandible
I: skin & fascia of chin
N: facial nerve (CN VII)
A: elevation of lower lip; everts lower lip; wrinkles skin of chin
Nasalis
O: transverse part: maxilla (lateral to nose); alar part: maxilla, superior to canine alveolar process
I: transverse part: opposite side nasalis over upper cartilage of nose; alar part: alar cartilage of nose (nasal wing)
N: facial nerve (CN VII)
A: flares nostrils (particularly in forced respiration
Occipitalis
O: lateral 2/3 of superior nuchal line & EOP
I: galea aponeurotica
N: facial nerve (CN VII); posterior auricular branch
A: draws back scalp to raise eyebrows & wrinkle brow (surprise)
Orbicularis Oculi
O: orbital portion: nasal process of frontal bone; palpebral portion: palpebral ligament; lacrimal portion: lacrimal crest of lacrimal bone
I: circumferentially around orbit meeting at the origin
N: facial nerve (CN VII); zygomatic branch
A: closes eye tightly, squinting of the eye; depresses upper eyelid, elevates lower eyelid (palpebral part)
Orbicularis Oris
O: modiolus (just lateral to angle of mouth)
I: circumferentially around mouth; blends with other muscles
N: facial nerve (CN VII)
A: closes mouth; protrudes lips (puckering of lips)
Platysma
O: subcutaneous fascia (over deltoid-pectoral region)
I: mandible & subcutaneous fascia of lower face
N: facial nerve (CN VII)
A: tenses skin over lower neck (creates ridge in skin); depress mandible & lower lip
Procerus
O: nasal bone & cartilages
I: skin & fascia between eyebrows
N: facial nerve (CN VII); superior buccal branches
A: draws medial eyebrow downward (menacing expression); wrinkles skin of superior nose
Risorius
O: parotid fascia (superficial to masseter)
I: modiolus (near angle of mouth)
N: facial nerve (CN VII)
A: draws angle of mouth laterally (false smile)
Zygomaticus Major
O: zygomatic bone (anterior to zygomatic-temporal suture)
I: modiolus (near angle of mouth)
N: facial nerve (CN VII)
A: elevates angle of mouth (smiling); pulls angle of mouth laterally
Zygomaticus Minor
O: zygomatic bone (posterior to zygomaticomaxillary suture)
I: skin, fascia & muscles of upper lip
N: facial nerve (CN VII)
A: elevates upper lip (smile); everts upper lip
