muscles of head and neck

8/11/2019 Muscles of Head and Neck

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MUSCLES OF HEAD


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Muscles of the Scalp

Occipitofrontalis

Frontal belly

Epicranial aponeurosis

Skin superior tosupraorbital margin

Draws skin anteriorly

and raises eyebrow,

wrinkles the skin of theforehead horizontally


3/21

Occipitofrontalis

Occipital belly

Occipital bone and

mastoid process of thetemporal bone

Epicranial aponeurosis

Draws scalp posteriorly


4/21

Orbicularis oculi:

palpebral

Medial palpebral

ligament Lateral palpebral raphe

CN7

Closes eyelids and

dilates lacrimal sac


5/21

Orbicularis oculi: orbital

Medial palpebral

ligament and adjoining

bone Loops and return to

origin Epicranial

aponeurosis

CN 7 Draws scalp posteriorly.


6/21

Orbicularis oris

Muscle fibers

surrounding opening the

mouth Skin at corner of mouth

CN 7

Closes and protrudes the

lips


7/21

Corrugator supercilii

Medial end of

superciliary arch of

frontal bone

Skin of eyebrow

CN7

Draws eyebrow inferiorly

and wrinkles skin of theforehead ertically as in

frowning


8/21

Zygomaticus major

Zygomatic bone

Skin at angle of mouth

CN 7 Draws angle of mouth

superiorly


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Zygomaticus minor

Zygomaticus minor

Upper lip

CN 7 Raises upper lip exposing

upper teeth


10/21

Levator labii superioris

Superficial to infraorbital

foramen of maxilla

Skin at angle of mouth CN 7

Raises upper lip


11/21

Depressor labii inferioris

Mandible

Skin of lower lip

Depresses the lower lip


12/21

Depressor anguli oris

Mandible

Angle of mouth

Draws angle of themouth laterally and

inferiorly


13/21

Levator anguli oris

Inferior to infraorbital

foramen

Skin of lower lip andorbicularis oris

Draws angle of mouth

laterally and superiorly


14/21

Buccinator

Alveolar processes of

maxilla and mandible

and pterygomandibular

raphe

Orbicularis oris

Presses the cheek

against teeth and lips as

in whistling, blowing and

sucking


15/21

Risorius

Fascia over the parotid

gland

Skin at angle of mouth Draws angle of mouth


16/21

Mentalis

Mandible

Skin of chin

Elevates and protrudeslip and pulls skin of chin

as in pouting


17/21

Neck Muscles

Platysma

Fascia over deltoid and

pectoralis major muscles

Mandible, blends withmuscles around the

angle of mouth and skin

of the lower face

Draws outer part of the

lower lip inferiorly and

posteriorly as in pouting;

depresses mandible


18/21

Masseter

Maxilla and zygomatic

arch

Angle and ramus ofmandible

Elevates mandible as in

closing

Mandibular branch,trigeminal nerve


19/21

Temporalis

Temporal bone

Coronoid process and

ramus of mandible Elevates and retracts

mandible


20/21

Medial ptrygoid

Medial surface of lateral

portion of pterygoid

process of sphenoid

bone; maxilla

Angle and ramus of

mandible

Elevates and protracts

mandible, moves the

mandible from side to

side


21/21

Lateral pterygoid

Greater wing and lateral

surface of lateral portion

of pterygoid process of

sphenoid bone

Condyle of mandible,

TMJ joint

Protracts mandible,

depresses mandible as in

opening mouth

muscles of head and neck

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