muscles of the facial expression

Question 1

frontalis

Answer 1

elevates the eyebrow in glancing upwards in surprise or fright; draws scalp forward and wrinkles skin of forehead.
the origin:galea aponeurotica
insertion:subcutaneous tissue of eyebrows
innervation:facial nerve
forms the occipitofrontalis with the occipitalis

Question 2

occipitalis

Answer 2

retracts the scalp; fixes galea aponeurotica so frontalis can act on the eyebrows
O: superior nuchal line and temporal bone
I: galea aponeurotica
innervation: facial nerve
forms the occipitofrontalis with the frontalis

Question 3

orbicularis oculi

Answer 3

sphincter of the eyelids: closes eye in blinking,squinting and sleep;aids in flow of tears across the eye
O: lacrimal bane;adjacent regions of frontal bone and maxilla; medial angle of eyelids
I: upper and lower eyelids; skin around main of orbit
innervation: facial nerve
forms the orbital and nasal region

Question 4

levator palpebrae superioris

Answer 4

elevates the upper eyelid; opens eye
O: lesser wing of spheniod in posterior wall of orbit
I: upper eyelid
innervation: oculomotor nerve 
forms the orbital and nasal region

Question 5

corrugator supercilii

Answer 5

draws eyebrows medially and downward in frowning and concentration; reduces glare of bright sunlight
O: medial end of supraorbital margin
I: skin of eyebrow 
innervation: facial nerve
forms the orbital and nasal region

Question 6

nasalis

Answer 6

widens nostrils; narrows internal air passage between vestibule and nasal cavity
O: maxilla just lateral to the nose
I: bridge and alar cartilages of the nose
innervation: facial nerve
forms the orbital and nasal region

Question 7

orbicularis oris

Answer 7

encircles mouth,closes lips,protrudes lips as kissing; unique;y developed in humans for speech
O: modiolus of mouth
I: submucosa and dermis of lips
innervation: facial nerve 
forms the oral region

Question 8

levator labii superioris

Answer 8

elevates and everts upper lip in sad, sneering or serious expressions
O: zygomatic bone and maxilla near inferior margin of orbit
I: muscles of upper lip
innervation: facial nerve
forms the oral region

Question 9

levator anguli oris

Answer 9

elevates angle of the mouth as in smiling
O: maxilla just below infraorbital foramen
I: muscles at angle of angle
innervation: facial nerve
forms the oral region

Question 10

zygomaticus major

Answer 10

draws angle of mouth upward and laterally in laughing 
O: zygomatic bone 
I: superolateral angle of mouth 
innervation: facial nerve 
forms the oral region

Question 11

zygomaticus minor

Answer 11

elevates upper lip, exposes upper teeth in smiling or sneering 
O: zygomatic bone
I: muscles of upper lip 
innervation: facial nerve 
forms the oral region

Question 12

risorius

Answer 12

draws angle of mouth laterally in expressions of laughing, horror or disdain
O: zygomatic arch; fascia near ear 
I: modiulus 
innervation: facial nerve
forms the oral region

Question 13

depressor anguli oris

Answer 13

draws angle of mouth laterally and downward in opening mouth or sad expressions 
O: inferior margin of mandibular body
I: modiolus 
innervation: facial nerve 
forms the oral region