1/2 AOI Flashcards
frontalis action
raises eyebrows
frontalis origin
epicranial aponeurosis
frontalis insertion
skin of eyebrows and root of nose
occipitalis action
pulls scalp posteriorly
occipitalis origin
occipital and temporal bones
occipitalis insertion
epicranial aponeurosis
temporalis action
closes jaw, elevates and retracts mandible
temporalis origin
temporal fossa
temporalis insertion
coronoid process of mandible
masseter action
prime mover of jaw closure, elevates mandible
masseter origin
zygomatic arch and zygomatic bone
masseter insertion
angle and ramus of manidble
medial pterygoid action
acts with lateral pterygoid muscle to protrude mandible and promote side-to-side action
medial pterygoid origin
medial surface of lateral pterygoid plate of sphenoid bone, maxilla and palatine bone
medial pterygoid insertion
medial surface of mandible near angle
lateral pterygoid action
forward sliding and side-to-side grinding movements of lower teeth
lateral pterygoid origin
greater wing and lateral pterygoid plate of sphenoid bone
lateral pterygoid insertion
condyle of mandible and temporomandibular joint
zygomaticus action
raises lateral corners of mouth upwards
zygomaticus origin
zygomatic bone
zygomaticus insertion
skin and muscle at the corner of mouth
buccinator is the muscle of…
mastication
buccinator action
compresses cheek and draws mouth laterally
buccinator origin
molar region of maxilla and mandible
buccinator insertion
orbicularis oris
platysma action
tenses skin of neck and depresses mandible
platysma origin
fascia of chest
platysma insertion
lower margin of mandible, skin and muscle at corner of mouth
orbicularis oculi action
closes eye, produces blinking and squinting, draws eyebrows inferiorly
orbicularis oculi origin
frontal and maxillary bones, ligaments around orbit
orbicularis oculi insertion
tissue of eyelid
orbucilaris oris action
closes lips, purses and protrudes lips
orbicularis oris origin
maxilla and mandible
orbicularis oris insertion
skin and muscle at the angles of the mouth
levator labii superioris action
opens lips, raises and furrows upper lip
levator labii superioris origin
zygomatic bone and infraorbital margin of the maxilla
levator labii superioris insertion
skin and muscle of upper lip
depressor labii inferioris action
draws lips inferiorly
depressor labii inferioris origin
body of mandible lateral to its midline
depressor labii inferioris insertion
skin and muscle of lower lip
sternocleidomastoid action
flexes and laterally rotates head, neck flexion
sternocleidomastoid origin
manubrium of sternum and medial portion of clavicle
sternocleidomastoid insertion
mastoid process of temporal bone, superior nuchal line of occipital bone
scalenes action
elevation of ribs 1&2, lateral flexion and rotation of neck
scalenes origin
transverse processes of C3-7 vertebrae
scalenes insertion
ribs 1-2
serratus anterior action
abduction, medial rotation of and stabilization of scapula by holding it against thoracic wall
serratus anterior origin
ribs 1-8
serratus anterior insertion
medial border of the scapula
