Muscle worksheet Flashcards
epicranius
raises eyebrows, wrinkles forehead
buccinator
compresses the cheeks against the teeth and is used in acts such as blowing
orbicularis oculi
closes eyelids
zygomaticus major
draws angle of mouth upward and laterally= SMILE
zygomaticus minor
elevates upper lip= SAD FACE
orbicularis oris
pucker lips= KISS
temporalis
origin- temporal/ frontal bones;
insertion- mandible
fxn- elevate/ retract mandible
masseter
origin- zygomatic arch
insertion- mandible
fxn- elevates mandible (closes the mouth) & protraction
sternocleidomastoid
origin- sternum & clavicle
insertion- (mastoid process of) temporal bone
fxn- together: flexes neck & extends head
alone: one side bends head toward shoulder/ opposite side
scalene
origin- transverse process of cervical vertebrae
insertion- ribs
fxn- flex neck [elevates 1st & 2nd ribs]
erector spinae group
extends vertebral column
external intercostal
elevate ribs= inhalation
internal intercostal
lower ribs= exhale
transverse throacis
depresses ribs
diaphragm
contraction expands thoracic cavity, compresses abdominopelvic cavity
