Muscles Of Head And Face (2) Flashcards
What is the function of the occipitofrontalis front belly?
Elevates eyebrows
Wrinkles skin on forehead
Protracts scalp (surprise/curiosity)
What is the innervation of the occipitofrontalis front belly?
Facial nerve
What is the function of the occipitofrontalis occipital belly?
Retracts scalp (increase effectiveness of front belly)
What is the innervation of the occipitofrontalis occipital belly?
Facial nerve
What is the function of the corrugator supercili?
Draws eyebrows medial/inferior
Creates wrinkles above nose (concern/worry)
What’s the innervation of the corrugator supercili?
Facial nerve
What is the function of the procerus?
Depresses medial eyebrow
Wrinkles skin over nose (dislike)
What is the innervation of the procerus?
Facial nerve
What is the function of the nasalis?
Depresses Ala laterally
Helps elevate upper lip
Flares nostrils (anger)
What is the function of the orbicularis oculi?
Closes eyelids
Palpebral part does this gently
Orbital part does this tightly
What is the innervation of the orbicularis oculi?
Facial nerve
What is the innervation of the nasalis?
Facial nerve
What is the function of the buccinator?
Presses cheek against molars
Works with tongue to keep food in occlusal surfaces
Resists distention (when blowing)
What is the innervation of the buccinator?
Facial nerve
What is the function of the risorius?
Dilates mouth
Frown (sad)
What is the innervation of the risorius?
Facial nerve
What is the function of the zygomaticus major?
Dilates mouth
Smile
Unilaterally (sneers, disdain)
What is the innervation of the zygomaticus major?
Facial nerve
What is the function of the zygomaticus minor?
Dilates mouth
Elevates and everts upper lip
Deepen nasolabial sulcus (sadness)
What is the innervation of the zygomaticus minor?
Facial nerve
What is the function of the levator labii superioris?
Dilates mouth
Elevates or everts upper lip
Deepen nasolabial sulcus (sad)
What is the innervation of the levator labii superioris?
Facial nerve
What is the function of the levator anguli oris?
Dilates mouth
Widens oral fissure (grin/grimace)
What is the innervation of the levator anguli oris?
Facial nerve
What is the function of the depressor anguli oris?
Dilates mouth
Frown
What is the innervation of the depressor anguli oris?
Facial nerve
What is the function of the depressor labii inferioris?
Dilates mouth
Depresses or everts lower lip (pouting)