Muscles of the head and neck

Question 1

Epicranius (occipitofrontalis)

Answer 1

movement: raises eyebrows
origin: bones of the skull
insertion: epicranial apneurosis

Question 2

Orbicularis oculi

Answer 2

sphincter muscle; closes ete as in blinking and winking

Question 3

Orbicularis oris

Answer 3

sphincter musclel compresses lips over teeth/protrudes lips as in kissing

Question 4

Buccinator

Answer 4

draws corners of mouth lateral as in whistling or sucking

Question 5

Zygomaticus (major and Minor)

Answer 5

both originate on zygomatic bone and insert at corner of mouth
-elevates corner of mouth as in smiling and speaking

Question 6

Masseter

Answer 6

most powerful of muscles that move the jaw

• Movement: elevates mandible as in chewing and speaking
• origin: along zygomatic arch
• insertion rams of mandible

Question 7

Temporalis

Answer 7

elevates and retracts mandible as when chewing

• origin: bones of the skull
• insertion: mandible, skin of cheek

Question 8

Platysma

Answer 8

Movement:- depresses mandible as in talking
origin- fascia over deltoid and pectorals major muscles
insertion: mandible, skin of cheek

Question 9

Sternocleidomastoid

Answer 9

movement: bends bead towards shoulder, turns face to opposite side
- origins 2; manubrium of sternum and medial of 1/3 of the clavicle
- insertion:mastoid process of temporal bone
- works with scalene muscles during forced inhalation (raises ribs)