muscles of the head and neck Flashcards
raises eyebrows, pulls scalp posteriorly
Frontalis and Occipitalis, have epicranius between them
origin: occipital and temporal bones
insertion: skin of eyebrows
close eye lids
orbicularis oculi
origin: frontal and maxillary bones
insertion: skin of eye lids
draws corner of lip laterally
Risorius
origin: fascia of masseter
insertion: skin at angle of mouth
close lips
Orbicularis oris
origin: maxilla and mandible
insertion: skin of mouth
elevates corners of mouth
zygomaticus
origin: zygomatic bone
insertion: skin and muscle at corners of mouth
draws corners of lip laterally, deep
buccinator
origin: molar region of mandible and maxillae
insertion: orbicularis oris
draws lower lip inferiorly
depressor labii inferioris
origin: body of mandible
insertion: skin and muscle of lower lip
raises upper lip
legator Labii superioris
origin: zygomatic bone and maxilla
insertion: skin and muscle of upper lip.
draws corners of the mouth down and lateral
depressor anguli oris
origin: mandible
insertion: skin and muscle at angle of mouth
protrudes lower lip
mentalis
origin: anterior mandible
insertion: skin of chin
elevate mandible
Masseter
origin: zygomatic arch and maxilla
insertion: angle and rams of mandible
elevate and retract mandible
temporalis
origin: temporal fossa
insertion: coronoid process of mandible
depress mandible
platysma
origin: fascia of chest
insertion: mandible
flex neck and rotate head
sternocleidomastoid
origin: manubrium of sternum and clavicle
insertion: mastoid process of temporal bone
flex and rotate neck, elevate ribs
Scalenes
origin: transverse process of cervical vertebrae
insertion: ribs 1and2
