Infratemporal Region Lab

Question 1

What is the nerve supply to the lateral pterygoid muscle?

Answer 1

Lateral pterygoid nerve from the mandibular nerve (V3)

Question 2

Describe Trigeminal Neuralgia (tic douloureux)

Answer 2

• Pain described as among the most acute known to mankind
• In maxilla area
• Maxillary nerve involved (V2)
• Lightning strikes of facial pain, typically near the nose, lips, eyes, or ears
• Pain usually initiated by touching face

Question 3

What is trigeminal neuralgia treated?

Answer 3

-Sponge placed between the cerebral artery and trigeminal nerve - to treat the neuralgia, the pulsing of the artery irritated the nerve

Question 4

What is Bell Palsy?

Answer 4

It involves paralysis of the facial muscles on the affected side. Usually involves the facial nervier the distal facial canal or its exit from the stylomastoid foramen

Question 5

What are symptoms for Bell Palsy?

Answer 5

• Drooping of lips on affected side with food and saliva dribbling out
• Lower eyelid falls away from eyeball
• Food accumulates between the gums and the cheek
• Loss of facial expression
• Nasolabial fold will be missing from affected side
• Nerve will usually regenerate and heal itself at least partly

Question 6

What complication can happen with the TMJ?

Answer 6

TMJ = temporomandibular joint
-Head of the mandible can slide forward on the articular disk if you open your mouth too wide - head of mandible can get ahead of mandibular tubercle & you can’t close your jaw –> doctor has to push it back in place

Question 7

What does the auriculotemporal nerve supply?

Answer 7

Lateral head region

-Also carries postganglionic parasympathetic fibers to the parotid gland for salivary secretion

Question 8

Where are the cell bodies of the postganglionic parasympathetic fibers?

Answer 8

Otic ganglion (on medial side of V3 after it exits the foramen ovale )

Question 9

Where are preganglionic fibers found (to the otic ganglion)?

Answer 9

CN IX - cell bodies are in inferior salivary nucleus that is located in the medulla

Question 10

Where is the otic ganglion?

Answer 10

Medial side of V3

Question 11

What does the inferior alveolar nerve sense?

Answer 11

It is sensory to the teeth of the mandible and exits the mental foramen as the mental nerve

Question 12

What does the lingual nerve sense?

Answer 12

anterior 2/3 of the tongue

Question 13

What does the mylohyoid nerve sense?

Answer 13

Mylohyoid muscle & anterior belly or the digastric

Question 14

What does the superficial nerve to the temporalis muscle detect?

Answer 14

Sensory information

Question 15

What do motor branches of V3 supply?

Answer 15

Muscles of mastication

Question 16

What does the mental nerve sense?

Answer 16

Lower lip

Question 17

What innervates the medial pterygoid? What is its’ function?

Answer 17

• V3, motor branch - “Nerve to medial pterygoid”

- Elevator of the mandible

Question 18

What does the chorda tympani carry?

Answer 18

Preganglionic parasympathetic fibers to the submandibular ganglion and special sensory fiber for taste to the anterior 2/3 of tongue

Question 19

Where does the chorda tympani pass?

Answer 19

From facial nerve to lingual nerve

Question 20

What supplies the posterior belly?

Answer 20

Facial nerve

Question 21

What innervates the stylohyoid muscle?

Answer 21

Facial Nerve (CN VII)

Question 22

What is the function of the lateral pterygoid muscle?

Answer 22

-Protrusion and depression of the mandible

Question 23

What accompanies the sensory fibers in the auriculotemporal nerve?

Answer 23

Post-ganglionic parasympathetic neurons

Question 24

What are these branches of?

• Buccal nerve
• Lingual nerve
• Nerve to the masseter muscle
• Nerve to the medial pterygoid muscle

Answer 24

V3

Question 25

What nerve innervates the anterior belly of the digastric and the mylohyoid muscle?

Answer 25

Mylohyoid nerve

Question 26

What nerve innervates the posterior belly of the digastric and is derived from the second pharyngeal arch?

Answer 26

Facial Nerve

Question 27

What ganglion contains the cell bodies of taste fibers associated with the facial nerve?

Answer 27

Geniculate ganglion

Question 28

In what ganglion do preganglionic parasympathetic neurons associated with the chorda tympani terminate?

Answer 28

Submandibular ganglion

Question 29

What types of neurons are found in the chord tympani?

Answer 29

Preganglionic parasympathetic neurons and taste neurons.

Question 30

What ganglion do preganglionic parasympathetic fibers do neurons associated with the glossopharyngeal nerve terminate?

Answer 30

Otic Ganglion

Question 31

Postganglionic neurons of the otic ganglion accompany what nerve to their organ of innervation?

Answer 31

Auriculotemporal Nerve