Head and Neck Muscles

frontalis

muscle?

occipitalis

muscle?

orbicularis oculi

muscle?

orbicularis oris

muscle?

zygomaticus major

muscle?

zygomaticus minor

muscle?

temporalis

muscle?

masseter

muscle?

platysma

muscle?

sternocleidomastoid

muscle?

masseter origin

from zygomatic arch

frontalis origin

from epicranial aponeurosis

occipitalis origin

from occipital and temporal bones

orbicularis oculi origin

from medial margin of orbit

orbicularis oris origin

from maxilla and mandible bones

platysma origin

from rib 2 cartilage and acromion

sternocleidomastoid origin

from sternal clavicle and manubrium

temporalis origin

from temporal lines

zygomaticus major origin

from zygomatic bone, near the zygomatico-temporal suture

zygomaticus minor origin

from zygomatic bone, posterior to zygomatico-maxillary suture

masseter insertion

into lateral ramus of mandible

frontalis insertion

into skin of eyebrow and bridge of nose

occipitalis insertion

into the epicranial aponeurosis

orbicularis oculi insertion

into skin by the eyelids

orbicularis orbis insertion

into the lips

platysma insertion

into mandible and skin of cheek

sternocleidomastoid insertion

into the mastoid process

temporalis insertion

into coronoid process of mandible

zygomaticus major insertion

into the corner of the mouth

zygomaticus minor insertion

into the upper lip

masseter action

elevates the mandible such that the jaws close

frontalis action

raises eyebrows and wrinkles the forehead

occipitalis action

tenses and relaxes the scalp

orbicularis oculi action

closes the eyes

orbicularis oris action

purses the lips

platysma action

tenses skin of the neck, depresses the mandible, pulls the lower lip inferiorly

sternocleidomastoid action

flexion of the neck

temporalis action

elevates the mandible

zygomaticus major action

retracts and elevates corners of the mouth

zygomaticus minor action

retracts and elevates the upper lip