head/face muscles

muscles of the face

• move the skin

• change facial expressions; convey mood

• Most attach to bone or fascia

• produce their effect by pulling on the skin

characteristics of the muscles of facial expressions

• subutaneous

• surround orifices

• act as sphincters/dilators to open/close orifices

• face has no distinct deep fascia; loose connective tissue

occipitalfrontalis

• elevates the eyebrows [suprise]

• produces transverse wrinkles in forehead with frowning

• frontal belly arises from the anterior part of the epicranial aponeurosis

• attached to the skin of the eyebrows

• has no body attachments

corrugator supercilli

• demonstrates concern or frowning

• draws medial end of the eyebrow downward and wrinkles the forehead vertically

• inserts into the skin of the eyebrow

• arises from the orbital part of the orbicularis oculi and nasal prominence

procures

• produces transverse wrinkles over the bridge of the nose

• arises from the nasl bone and lateral nasal cartilage

• fibers pass upwards overlying the bridge of the nose

• some consider it a member of the orbital group facial muscles

orbicularis oculi

• closes the eye and wrinkles the forehead vertically

• assists in the flow of tears

• brings lids together laterally first

• closes the palpebral fissure in a lateral-to-medial direction

• consists of 3 parts:

  • lacrimal

  • palpebral

  • orbital

what are the three parts of the orbicularis oculi?

• lacrimal

• palpebral

• orbital

lacrimal part of the orbicularis oris

draws eyelids medially

palpebral part of the orbicularis oris

gently closes eyelids, blinking, sleep; keeps cornea from drying

orbital part of the orbicularis oculi

strongly closes eyelids; squinting; crows feet

nasalis

• originates the superior part of the canine ridge of maxilla

• inserts in the nasal cartilages

• draws ala of the nose towards the nasal septum

what is a part of the nasalis?

dilator naris

zygomaticus major

• draws the angel of the mouth superolaterally

• smiling/laughing

• extending from the zygomatic bone to the angle of the mouth

zygomaticus minor

• helps raise the upper lip when showing contemp or sadness

• narrow slip of muscle

• passes obliquely from zygomatic bone to the orbicularis oris

levator labii superioris alaeque nasi

• dilate the nostrils

• elevate the upper lip

• divides into 2 slips that attch to the alar cartilage of the nose and upper lip and elevate these structures

• attaches superiorly to the maxilla

orbicularis oris

• sphincter of te mouth; first in a series of the digestive tract

• fibers encircle the mouth are within the lips

• contraction - closed mouth

• active contraction - mouth narrow, lips pucker [whistling]

• important for speech and compression of lips against the teeth

• work with the tongue to hold food between the teeth during mastication

levator labii superioris

• raises and evert the upper lip

• helps the zygomatic minor to deepend the nasolabial sulcus when showing sadness

• descends from the infraorbital margin of to the upper lip

levator anguli oris

• elevates the corners of the mouth

• Attaches superiorly to the infraorbital margin and inferiorly to the angle of the mouth

buccinator

• active in smiling

• keeps cheek taut preventing it from folding and being bitten

• aids mastication by pressing cheeks against molar teeth during chewing

• used during whistling and sucking by forcing the cheeks against teeth

• compresses cheeks during blowing

• named for blowing trumpet

masseter

• thick powerful

• side of moth

• closes the mouth during chewing

• attaches to the zygomatic arch

• rectangular or quadrilateral muscle

• superficial and deep layers

• inserts into angle/lateral surface of mandible

depressor labii inferioris

• draws the lip inferiorly and slightly laterally

• show impatience

• lateral to the mentalis

• attaches inferiorly to the mandible and merges superiorly with its contralateral partner and the orbicularis oris

depressor anguli oris

• depresses angles of mouth as in frowning

risorius

• draws the corner the mouth laterally when grinning

• attaches to the fascia covering the parotid gland

• arises from the platysma and fascia of the masseterentalim

mentalis

• raises the skin of the chin during expression of doubt

• small muscle arising from the mandible and ascending to the skin of the chin

platysma

• tenses skin

• Blends with facial muscles

• superior attachment

• broad, thin sheet of muscle

• arises in the fascia

What muscle is highlighted?

frontalis

What muscle is being pointed at?

corrugator supercilii

What is the blue line pointing at?

frontalis m.

what is the pink line pointing at?

procures m.

what is the yellow line pointing at?

corrugator supercollider

What is the circled muscle?

procerus

What is the orange arrow pointing at?

palpebral part of thte oribularis oculi

What is the pruple arrow pointing at?

larcrimal part of the orbicularis oculi

what is the blue arrow pointing at?

orbital part of the orbicularis oculi

What is the highligthed muscle?

orbicularis oculi

what is the top arrow?

nasalis

what is the bottom arrow?

dilator naris of the nasalis

what muscle is highlighted?

nasalis

what muscle is the arrow pointing at?

zygomaticus major

what muscle is highlighted?

zygomaticus major

what muscle is being pointed at?

zygomaticus minor

What muscle is being pointed at/circled?

levator labii superioris alaeque nasi

what muscle are the arrows pointing at?

orbicularis oris

What muscle is highlighted?

orbicularis oris

What muscle are the arrows pointing at?

levator labii superioris

what muscle are the arrows pointing at?

levator anguli oris

what muscle is highlighted?

levator labii superioris

What muscle is the blue line pointing at?

levator labii superioris

what muscle is the green arrow pointing at?

levator anguli oris

what muscle is the arrow pointing at?

buccinator

What muscle is the yellow arrow pointing at?

masseter

what muscle are the arrows pointing at?

depressor labii interiors

what muscle are the arrows pointing at?

depressor anguli oris (arrows)

what muscle is being highlighted?

depressor labii inferioris

what muscle is highlighted?

depressor anguli oris

what muscle is being pointed at?

risorius

What muscle are the arrows pointing at?

mentalis

what muscle is being highlighted?

mentalis

what muscle is being pointed at?

platysma

What muscle is highlighted?

platysma