Muscles of facial expression

Question 1

What are the muscles of facial expression in the calvaria? Name its action as well

Answer 1

Epicranius muscle (occipitofrontalis)=> muscles of the scalp and wrinkles the forehead

Question 2

What are the muscles of facial expression in the orbital group? Name its action as well

Answer 2

Oribularis oculi: => closes eyelid

oribital part=>tight contracts skin around eye

palpebral part=>palpebral reflex

lacrimal part=>acts on lacrimal sac

Question 3

What are the muscles of facial expression in the oral group? Name its action as well

Answer 3

1. Orbicularis oris=>closes mouth
2. Buccinator=>muscle in cheek important in eating/drinking/playing trumpet
3. zygomaticus major, minor=> smiling
4. Risorius=>smiling
5. Levator labii superioris=>elevate up lip
6. Levator labii superioris alaeque nasi=> elevate upper lip, flares nasal alar cart
7. levator anguli oris=>pulls corner of mouth up
8. depressor labii inferioris=> pulls down lower lip
9. Depressor anguli oris=> pulls angle of mouth down
10. mentalis=> pulls skin of chin up

Question 4

What are the muscles of facial expression in the neck? Name its action as well

Answer 4

platysma=> elevates skin of thorax and neck