7 (muscles of mastication)

Question 1

what does the masseter attach to

Answer 1

• superiorly to the medial and inferior aspect of the zygomatic arch (origin)
• inferiorly to the lower border on the lateral surface of the ramus of the mandible (insertion)

Question 2

what does the temporalis attach to

Answer 2

• superiorly to the floor of the temporal fossa to the fascia that overlies it (origin)
• inferiorly to the coronoid process and to the anterior surface of the ramus (insertion)

Question 3

where is a large portion of the temporalis

Answer 3

behind the zygomatic bone

Question 4

what does the medial pterygoid attach to

Answer 4

• Deep head: medial surface of the lateral pterygoid plate.
  Superficial head: the palatine bone (maxillary tuberosity) (origin)
• lower edge of the medial surface of the ramus of the mandible (insertion)

Question 5

what does the lateral pterygoid attach to

Answer 5

• Inferior head: lateral surface of the lateral pterygoid plate (origin) and capsule of TMJ + pterygoid fovea (insertion)
• Superior head: greater wing of the sphenoid bone (origin) and capsule of the TMJ (insertion)

Question 6

Which muscles elevate the mandible

Answer 6

• temporalis
• masseter
• medial pterygoid

Question 7

Which muscles protract the mandible

Answer 7

• lateral pterygoid
• masseter
• medial pterygoid

Question 8

Which muscles retract the mandible

Answer 8

• posterior fibres of temporalis