Chapter 2 : Muscles

Question 1

Name the 3 muscles of mastication ?

Answer 1

Masseter
Temporalis
Buccinator

Question 2

State the action of the risorious muscle

Answer 2

Aids in facial expression by pulling the corner of the mouth laterally via its contraction ( inward and outward )

Question 3

What is the action of the platysma ?

Answer 3

Can produce an expression of sadness surprise and horror by lowering the corners of the mouth and lower lip

Question 4

Where are the corrugator muscles and what are there action ?

Answer 4

Deep to the medial end of each eyebrow - contracts to draw the two eyebrows together medially and inferiorly

Question 5

State the position of the mentalis

Answer 5

Paired central muscle of the lower lip situated at the top of the chin

Question 6

Where are the sterno cleido mastoid muscles found

Answer 6

Travels obliquely across the side of the neck

Question 7

What are the deltoids

Answer 7

Shoulder muscles that draw the arm backwards , forwards , rotates and abducts