Chapter 11 Part 1 Muscles of the Face

Fig. 11. 2 a Superficial Epicranius • Facial expression muscles originate in superficial fascia

Fig. 11. 2 a • Epicranius runs across top of head from forehead to

Fig. 11. 2 a Superficial Deep • Corrugator supercilii is deep to occipitofrontalis •

Fig. 11. 2 a Superficial Deep • Levator palpebrae superioris raises eyelid • opens

Fig. 11. 2 a • Orbicularis oris surrounds mouth Superficial Deep • closes mouth,

Fig. 11. 2 a Superficial • levator labii superioris extends from under eye to

Fig. 11. 2 a • mentalis attaches to lower lip Superficial Deep • protrudes

Fig. 11. 3 Depressor anguli oris (frown) Orbicularis oris (close mouth/kiss) Orbicularis oculi (blink/close

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Chapter 11, Part 1 Muscles of the Face

Fig. 11. 2 a Superficial Epicranius • Facial expression muscles originate in superficial fascia or on skull bones • Insert into superficial fascia of skin Deep Epicranial aponeurosis Frontal belly of occipitofrontalis Procerus Corrugator supercilii Levator palpebrae superioris Orbicularis oculi Levator labii superioris Zygomaticus minor Zygomaticus major Risorius Depressor anguli oris Depressor labii inferioris Platysma Nasalis Levator anguli oris (cut) Masseter Buccinator Orbicularis oris Mentalis Sternocleidomastoid

Fig. 11. 2 a • Epicranius runs across top of head from forehead to Epicranius back of skull • occipitofrontalis muscle with epicranial aponeurosis • frontal belly of occipitofrontalis on forehead • occipital belly on occipital bone Superficial Epicranial aponeurosis Frontal belly of occipitofrontalis Deep

Fig. 11. 2 a Superficial Deep • Corrugator supercilii is deep to occipitofrontalis • draws eyebrows together • creates vertical wrinkles above nose • Procerus is vertical across bridge of nose • wrinkles the nose • nasalis elevates corners of nostrils • “flares the nostrils” Procerus Corrugator supercilii Nasalis

Fig. 11. 2 a Superficial Deep • Levator palpebrae superioris raises eyelid • opens the eye • orbicularis oculi surrounds orbit of eye Orbicularis • closes eye (wink, blink, oculi squint) Levator palpebrae superioris

Fig. 11. 2 a • Orbicularis oris surrounds mouth Superficial Deep • closes mouth, puckers lips • depressor labii inferioris pulls lower lip down • depressor anguli oris is “frown” muscle • pulls corners of mouth down Depressor anguli oris Depressor labii inferioris Orbicularis oris

Fig. 11. 2 a Superficial • levator labii superioris extends from under eye to upper lip • pulls upper lip up in snarl or sneer • levator anguli oris pulls corner of Levator labii mouth superiorly and laterally superioris • zygomaticus major and Zygomaticus minor zygomaticus minor pull corner Zygomaticus major of mouth superiorly and laterally Risorius • smile • risorius pulls corner of mouth laterally • smile Deep

Fig. 11. 2 a • mentalis attaches to lower lip Superficial Deep • protrudes lower lip (pout) • platysma tenses skin of neck, pulls lower lip down • buccinator compresses cheek against teeth • protrudes lower lip (pout) Masseter • masseter raises and lowers jaw Buccinator Platysma Mentalis

Fig. 11. 3 Depressor anguli oris (frown) Orbicularis oris (close mouth/kiss) Orbicularis oculi (blink/close eyes) Zygomaticus major (smile) Platysma Frontal belly of occipitofrontalis (wrinkle forehead, raise eyebrows) (tense skin of neck)