Lab 2: Facial Muscles Flashcards
Ligaments connecting humerus to scalpula
Sternocleidomastoid (SCM)
origin
insertion
action
origin: manubrium
insertion: mastoid process
action: flex neck
Frontalis
origin
insertion
action
aka frontal belly
origin: galea aponeurotica
insertion: skin superior to orbit
action: raises eyebrows
Occipitalis
origin
insertion
action
aka occipital belly
origin: occipital bone
insertion: galea aponeurotica
action: pulls scalp posteriorly
orbicularis oculi
origin
insertion
action
origin: maxilla
insertion: skin of eyelid
action: closes eye
Orbicularis Oris
origin
insertion
action
origin: fascia
insertion: skin of lips
action: closes lips
Corrugator Supercilii
origin
insertion
action
origin: nasal bridge
insertion: skin of eyebrow
action: pulls skin of eyebrow together
Zygomaticus
origin
insertion
action
origin: zygomatic bone
insertion: muscle and skin at angle of mouth
action: elevates upper lip
Mentalis
origin
insertion
action
origin: mandible
insertion: skin of chin
action: wrinkles chin
Buccinator
origin
insertion
action
origin: maxilla
insertion: orbiculariis oris
action: flattens cheek
Depressor Labii Inferioris
origin
insertion
action
origin: lower mandible
insertion: orbicularis oris
action: depresses lower lip
Levator Labii Superioris
origin
insertion
action
origin: maxilla
insertion: orbicularis oris
action: elevates upper lip
Temporalis
origin
insertion
action
origin: temporal fossa
insertion: coronoid process
action: chewing
Masseter
origin
insertion
action
origin: zygomatic arch
insertion: mandible
action: chewing
Depressor Anguli Oris
origin
insertion
action
origin: mandible
insertion: mouth
action: draws corner of mouth down
