CH 13: Face Muscles

Question 1

Need to know ID and action: Frontal and Occipital bellies

Answer 1

frontal - raise eyebrows/pull scalp back

occipital belly - helps with facial expressions

Question 2

Need to know ID and action: Orbicularis Oculi and Orbicularis Oris

Answer 2

Orbicularis Oculi - around eyes + closes eye

Orbicularis Oris - circle around mouth + close mouth

Question 3

Need to know ID and action: Mentalis

Answer 3

Front of chin + wrinkle chin

Question 4

Need to know ID and action: Zygomatic minor and major

Answer 4

raise upper lip and helps with smiling - outward and superiorly

Question 5

Need to know ID and action: Masseter

Answer 5

Large piece running laterally + chewing

Question 6

Need to know ID and action: Temporalis

Answer 6

Located at the temple + Closing the jaw

Question 7

Need to know ID, Origin + Insertion, and Action: sternocleidomastoid

Answer 7

ID = long on the neck

Origin: manubrium (sternum) and clavicle

insertion: mastoid process

Action: pulls sagittal and lateral flexion of neck