Muscles Of Mastication, Infratemporal Fossa - Stephens 3/30

Question 1

What passes between the sphenomandibular ligament and the neck of the mandible?

Answer 1

Maxillary artery and vein

Auriculotemporal nerve

Question 2

What ligament may become calcified and obstruct the needle in a maxillary nerve block?

Answer 2

Pterygospinous ligament

Question 3

What changes the axis rotation of the mandible?

Answer 3

Stylomandibular ligament

Question 4

What muscles do you palpate for motor component for examination of the Trigeminal nerve?

Answer 4

Temporalis m.

Masseter m.

Question 5

What are the muscles of mastication?

Answer 5

Temporalis, masseter, medial pterygoid, lateral pterygoid

Question 6

What passes between the 2 heads of the lateral pterygoid?

Answer 6

Maxillary artery and buccal nerve

Question 7

What courses between the medial and lateral pterygoids?

Answer 7

Inferior alveolar and lingual nerves

Question 8

What is the stimulus for the jaw-jerk/masseteric reflex?

What is the result?

Answer 8

Rapid depression of the chin

Reflex clinching of the teeth

Question 9

What are the receptors for the jaw-jerk reflex?

What happens after they are activated?

Then goes where?

Answer 9

Stretching of neuromuscular spindles in Masseter muscle

Afferent fibers course in the Masseteric nerve

Mesencephalic nucleus of CN 5

Question 10

After the afferent fibers have reached the sensory nucleus of CN 5, what happens next in the jaw-jerk reflex?

From there what happens?

What is the effector?

Final response?

Answer 10

Motor nucleus of CN 5

Efferents fibers course in the Masseteric nerve

Neuromuscular endplates in the masseter muscle

Contraction of masseter muscle

Question 11

What muscles are responsible for normal opening of the mouth?

Answer 11

Gravity

Lateral pterygoid

Question 12

What muscles are responsible for wide opening of the mouth?

Answer 12

Lateral pterygoid

Suprahyoid muscles

Question 13

What muscles are responsible for normal closing of the mouth?

Answer 13

Temporalis
Masseter
Medial Pterygoid

TMM

Question 14

The TMJ has 2 synovial cavities with associated joints, what are they and what kind are they?

Answer 14

Higher - gliding joint

Lower - hinge joint

Question 15

What is the articular disk of TMJ attached to?

Answer 15

Sphenomeniscus muscle and strong lateral (collateral) ligament

Question 16

The superior joint of TMJ is between what?

Inferior joint?

Answer 16

Mandibular fossa and articular tubercle

Articular disk and mandibular condyle

Question 17

Newborn mental angle is what?

Adult?

Senior patient?

4 yo child?

Answer 17

175

110-120

140

140

Question 18

Fractures of the neck of the mandible compromise what structures?

Answer 18

Maxillary a and v

Auriculotemporal nerve

Question 19

Fractures of the ramus of the mandible may damage what?

Answer 19

Lingual n.

Inferior alveolar n.

Question 20

Fractures of the body of the mandible may compress what?

Answer 20

Inferior alveolar nerve and vessels

Question 21

The auriculotemporal, long buccal, lingual, chord and tympani, and inferior alveolar nerves come out of what hole?

Answer 21

Foramen ovale

Question 22

The mylohyoid nerve supplies what muscles?

Answer 22

Mylohyoid

Anterior digastric m.

Question 23

What nerve supplies innervation to the taste buds of the anterior 2/3 of the tongue?

Answer 23

Chorda tympani

Question 24

What does the accessory meningeal artery supply?

Answer 24

Trigeminal ganglion

Question 25

What does the inferior alveolar artery give off?

What does it supply?

Terminates as what?

Answer 25

Small mylohyoid artery

Mandible, teeth, gingivae

Mental artery at the mental foramen

Question 26

What is located between the sphenoidal spine and the lingula of the mandible?

Answer 26

Sphenomandibular ligament