Head and Neck Muscles

mastication muscles

masseter, temporalis, buccinator

temporalis insertion

coronoid process and ramus of mandible

temporalis origin

Temporal fossa and fascia

temporalis action

elevates mandible

masseter origin

zygomatic arch and zygomatic bone

masseter insertion

ramus of mandible

masseter action

elevates mandible

buccinator origin

maxilla and mandible

buccinator insertion

orbicularis oris muscle

buccinator action

Compresses cheek

Sucking, whistling

facial expression muscles

frontal belly of occipital frontalis

obicularis oculi

levator labii superiororis

depressor anguli oris

depressor labii inferioris

obicularis oris

frontal belly of occipitofrontalis origin

frontal bone

frontal belly of occipitofrontalis action

rasies eyebrow

occipital belly of occipitofrontalis origin

occipital and temporal bones

occipital belly of occipitofrontalis action

retracts scalp

galea aponeurotica

origin of frontalis, connects the bellies

obicularis oculi origin

frontal bone and maxilla

obicularis oculi insertion

tissue of eyelid

obicularis oculi action

closes eye and squints

zygomaticus minor origin

zygomatic bone

zygomaticus minor insertion

upper lip

zygomaticus minor action

elevates upper lip, assists in smiling

zygomaticus major origin

zygomatic bone

zygomaticus major insertion

corner of mouth

zygomaticus major action

smiling

depressor anguli oris origin

mandible

depressor anguli oris insertion

angle of mouth

depressor anguli action

frowning

depressor labii inferioris origin

mandible

depressor labii inferioris insertion

lower lip

obicularis oris origin

maxilla and mandible

depressor labii inferioris action

depresses lower lip

obicularis oris insertion

lips

obicularis oris action

keeps mouth shut

Muscles of the Neck

sternocleidomastoid

anterior belly of digastric

posterior belly of digastric

mylohyoid

stylohyoid

sternohyoid

omohyoid superior belly

omohyoid infereior belly

sternocleidomastoid origin

sternum and clavicle

sternocleidomastoid insertion

mastoid process

sternocleidomastoid action

forceful inhalations, flexes neck

suprahyoid

above the hyoid bone

anterior belly of digastric

posterior belly of digastric

mylohyoid

stylohyoid

sternohyoid

anterior belly of digastric origin

digastric fossa of mandible

anterior belly of digastric insertion

hyoid bone

anterior belly of digastric action

elevate hyoid and can depress mandible

posterior belly of digastric origin

mastoid process

posterior belly of digastric insertion

hyoid bone

posterior belly of digastric action

elevate hyoid bone

mylohyoid origin

mandible

mylohyoid instertion

hyoid bone

mylohyoid action

elevates floor of mouth

stylohyoid origin

styloid process

stylohyoid insertion

hyoid bone

stylohyoid action

elevates hyoid

infrahyoid muscles

omohyoid superior belly

omohyoid inferior belly

omohyoid superior belly origin

intermediate tendon

omohyoid superior belly insertion

hyoid bone

omohyoid superior belly action

depresses hyoid bone and larynx

omohyoid inferior belly origin

scapula

omohyoid inferior belly insertion

intermediate tendon

omohyoid inferior belly action

depresses hyoid bone

what connects the omohyoids inferor belly to the superior belly ?

intermediate tendon

what muscle makes the intermedia tendon not visible ?

sternocleidomastoid