Muscles of the head, neck and face Flashcards
Frontalis
action: elevates eyebrows
buccinator
action: compresses cheeks
temporalis
action: elevates mandible
origin: temporal bone
insertion: coronoid process of mandible
Masseter
prime mover - elevates mandible
origin: zygomatic arch
insertion: ramus of the mandible
risorius
action: pulls side of mouth laterally (Fake Smile)
zygomaticus
action: elevates corner of mouth
origin: zygomatic bone
insertion: skin of mouth
mentalis
action: wrinkles chin
nasalis
action: flares nostrils
occipitalis
action: pulls scalp laterally
orbicularis oris
action: closes and purses lips
platysma
action: tenses skin on the neck
sternocleidomastoid
action: rotates and flexes head
origin: manubrium of sternum and clavicle
insertion: mastoid process of temporal bone
splenius capitis
extends and laterally rotates head
mylohyoid
action: elevates hyoid and floor of mouth
origin: mandible
insertion: hyoid bone
digastric
depresses the mandible
sternohyoid
action: depresses hyoid bone
origin: sternum
insertion: hyoid bone
omohyoid
action: depresses hyoid bone
origin: scapula
insertion: hyoid bone
