Anatomy W7 - Infratemporal Region & Maxillary nerve

Question 1

Define the infratemporal region.

Answer 1

Region deep to the ramus of the mandible

Question 2

Define the pterygomandibular space.

Answer 2

Space between the ramus of the mandible and the medial pterygoid muscle (this area is below the level of the lateral pterygoid)

Question 3

What is the long buccal nerve a branch of?

Answer 3

Branch of the mandibular division of the trigeminal

Question 4

What does the buccal nerve innervate?

Answer 4

SENSORY

The mucosa of the cheek
The buccal surface of the gums.

Question 5

Where does the external carotid give off its 2 terminal branches?

Answer 5

Within the superior part of the partoid gland

Question 6

Name the 2 terminal branches of the external carotid

Answer 6

The superficial temporal artery

The maxillary artery

Question 7

What muscle does the pterygoid venous plexus lie in and around?

Answer 7

The lateral pterygoid

Question 8

Name the 2 heads of the lateral pterygoid muscle.

Answer 8

The superior head

The inferior head

Question 9

Where is the origin and attachment of the superior head of the lateral pterygoid muscle?

Answer 9

Origin - base of the skull

Attachment - capsule of TMJ

Question 10

Where is the origin and attachment of the inferior head of the lateral pterygoid muscle?

Answer 10

Origin - lateral side of the lateral pterygoid plate

Attachment - The pterygoid fovea on the neck of the condyl

Question 11

Name the 2 heads of the medial pterygoid muscle.

Answer 11

The superficial head

The deep head

Question 12

Where is the origin of the superficial head of the medial pterygoid muscle?

Answer 12

Origin - maxillary tuberosity

Question 13

Where is the origin of the deep head of the medial pterygoid muscle?

Answer 13

Origin - medial surface of the lateral pterygoid plate

Question 14

What is the function of the lateral pterygoid?

Answer 14

Depresses and protrudes the mandible

Question 15

What is the function of the medial pterygoid?

Answer 15

Elevates, lateral movement and protrudes.

Question 16

What nerve supplies the lateral pterygoid?

Answer 16

The anterior trunk of the mandibular branch of the trigeminal.

Question 17

What nerve supplies the medial pterygoid?

Answer 17

A branch off the main trunk of the mandibular branch of the trigeminal nerve.

Question 18

What is the origin and attachment of the masseter?

Answer 18

Origin - the inferior border of the zygomatic arch

Attachment - lateral surface of the ramus of the mandible.

Question 19

What nerve supplies the masseter?

Answer 19

The anterior trunk of the mandibular division of the trigeminal nerve.

Question 20

What is the origin and attachment of the temporalis?

Answer 20

Origin - the temporal fossa and the temporal fascia (one of the few bones in the body which attach to connective tissue)

Attachment - medial surface of the coronoid process

Question 21

What nerve supplies the temporalis?

Answer 21

The deep temporal nerves from the anterior trunk of the mandibular division of the trigeminal nerve.