GI 1E- Mastication Flashcards
1
Q
What are the muscles of mastication
A
Temporalis, Masseter, Lateral pterygoid, Medial pterygoid, Buccinator
2
Q
What innervates the muscles of mastication
A
CN V3 (mandibular branch of trigeminal)
3
Q
Function of mastication
A
- Mechanical breakdown of food by teeth
- Chemical breakdown- ingested material mixes with saliva
- Produces a bolus- soft cohesive mass to be swallowed
4
Q
Describe motion of temporalis
A
elevates and retracts mandible
5
Q
Describe motion of masseter
A
elevates mandible
6
Q
Describe motion of lateral pterygoid
A
protrudes and opens jaw by drawing condyle disk forward
7
Q
Describe motion of medial pterygoid
A
elevates mandible
8
Q
complex 3-dimensional movement of the jaw results in
A
looping pattern
9
Q
Three phases of mastication
A
- Opening
- Closing
- Occlusal
10
Q
Which phase of mastication causes strongest and longest forces exerted
A
Occlusal
11
Q
What is white, furry and shaped like a tooth?
A
a Molar bear
