muscles of head and neck
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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
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Occipitofrontalis
Occipital belly
Occipital bone and
mastoid process of thetemporal bone
Epicranial aponeurosis
Draws scalp posteriorly
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Orbicularis oculi:
palpebral
Medial palpebral
ligament Lateral palpebral raphe
CN7
Closes eyelids and
dilates lacrimal sac
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Orbicularis oculi: orbital
Medial palpebral
ligament and adjoining
bone Loops and return to
origin Epicranial
aponeurosis
CN 7 Draws scalp posteriorly.
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Orbicularis oris
Muscle fibers
surrounding opening the
mouth Skin at corner of mouth
CN 7
Closes and protrudes the
lips
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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
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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
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Levator labii superioris
Superficial to infraorbital
foramen of maxilla
Skin at angle of mouth CN 7
Raises upper lip
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Depressor labii inferioris
Mandible
Skin of lower lip
Depresses the lower lip
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Depressor anguli oris
Mandible
Angle of mouth
Draws angle of themouth laterally and
inferiorly
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Levator anguli oris
Inferior to infraorbital
foramen
Skin of lower lip andorbicularis oris
Draws angle of mouth
laterally and superiorly
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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
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Risorius
Fascia over the parotid
gland
Skin at angle of mouth Draws angle of mouth
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Mentalis
Mandible
Skin of chin
Elevates and protrudeslip and pulls skin of chin
as in pouting
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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
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Masseter
Maxilla and zygomatic
arch
Angle and ramus ofmandible
Elevates mandible as in
closing
Mandibular branch,trigeminal nerve
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Temporalis
Temporal bone
Coronoid process and
ramus of mandible Elevates and retracts
mandible
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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
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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
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