Muscles of Facial Expression (O/I/A) Flashcards
Epicranius (Frontal Belly)
O: Epicranial Aponeurosis
I: Skin of Eyebrows, root of nose
A: Elevates Eyebrows
Epicranius (Occipital Belly)
O: Occipital, Temporal Bones
I: Epicranial Aponeurosis
A: Pulls scalp posteriorly
Corrugator supercilii
O: Arch of Frontal Bone above Nasal Bone
I: Skin of Eyebrow
A: Draws eyebrows medially/inferiorly
Orbicularis oculi
O: Frontal, maxillary bones around orbit
I: Tissue of Eyelid
A: Closes Eye
Zygomaticus major & minor
O: Zygomatic Bone
I: Skin and muscle at corner of mouth
A: Raises lateral corners of mouth (smile)
Risorious
O: Lateral Fascia associated with masseter muscle
I: Skin at angle of mouth
A: Draws corner of lip laterally
Levator labii superioris
O: Zygomatic bone, infraorbital margin of maxilla
I: Skin and muscle of upper lip
A: Opens lips
Depressor labii inferioris
O: Body of mandible lateral to midline
I: Skin and muscle of lower lip
A: Depresses lower lip
Orbicularis Oris
O: Indirectly from maxilla and Mandible
I: Angles of mouth
A: Closes lips
Depressor anguli oris
O: Body of mandible below incisors
I: Skin and muscle at angle of mouth
A: Draws corner of mouth inferiorly and laterally
Mentalis
O: Mandible below incisors
I: Skin of chin
A: Wrinkles chin
Buccinator
O: Molar region of maxilla and mandible
I: Orbicularis oris
A: Compresses cheeck
Platysma
O: Fascia of chest
I: Lower margin of mandible
A: Tenses skin of neck
