Nerves

Question 1

What is the largest division of the trigemenal nerve?

Answer 1

the mandibular division V3

Question 2

Where does the V3 nerve exits the cranial cavity into the infratemperol fossa?

Answer 2

the foramen Ovale

Question 3

What does the V3 nerve carrying with it?

Answer 3

general afferents

general efferents

Question 4

Where are the general afferents from?

Answer 4

from the lower teeth and gums, 
the anterior 2/3 of tongue, 
the floor of 
mouth, the lower lip and chin, 
the skin of temple 
 lower face and dura of the middle cranial 
fossa.

Question 5

What are the general efferents going?

Answer 5

muscles of mastication (masseter, temporalis, medial and lateral
pterygoids),
two muscles in the neck/floor of the mouth (anterior belly of the digastric and
mylohyoid muscle),
one soft palate muscle (tensor veli palatini), one muscle of the middle
ear (tensor tympani).

Question 6

What are the parasympathetic ganglia the V3 nerve suspend?

Answer 6

otic

submandibular

Question 7

What special afferent fibers does V3 carry?

Answer 7

taste from anterior 2/3 tongue to facial nerve 7

Question 8

What are the general afferent branches of V3?

Answer 8

Mennungal branch 
Buccal nerve 
auriculotemporal nerve
lingual nerve  
inferior alveolar nerve

Question 9

Where does the menningal afferent branch of V3 enter?

Answer 9

middle cranial fossa

Question 10

How does the menningal branch get into the cranial fossa?

Answer 10

Foramen spinosum

enters with menningal artery

Question 11

What does the menningal branch carry with it?

Answer 11

general afferents from the dura of the middle cranial fossa

Question 12

Where does the buccal nerve pass?

Answer 12

passes anteriorly between the heads of the lateral pterygoid muscle and winds up superficially positioned in the cheek.

Question 13

What does the buccal nerve carry?

Answer 13

general afferents from the skin of the cheek and oral mucosa.

Question 14

Where does the auriculotemporal nerve originate?

Answer 14

originates as two roots that pass posteriorly around the middle meningeal artery.

Question 15

Where does the auriculotemporal nerve continue posteriorly?

Answer 15

posteriorly between the tensor veli palatini and the lateral pterygoid muscles and then between the sphenomandibular ligament and the neck of the mandible.

Question 16

Where does auriculotemporal ascends to?

Answer 16

It ascends deep to the parotid gland between the ear and the TMJ

Question 17

What does the auriculotemporal nerve carry with it?

Answer 17

general afferents from the skin of the temple and ear,
general afferents and proprioception from the TMJ, which is highly sensitive.
carries hitchhiking postganglionic parasympathetic fibers to the parotid gland.

Question 18

Where does the lingual nerve descend?

Answer 18

descends between the tensor veli palatini and the lateral pterygoid muscles and is joined by the chorda tympani branch of the facial nerve (VII)

Question 19

where does the lingual pass after it descends?

Answer 19

passes across the medial pterygoid muscle close to the lingula of the mandible and into the floor of the mouth

Question 20

Where does the lingual nerve lie in the floor of the mouth?

Answer 20

it lies next to the ramus of the mandible just inferior to the last molar tooth

Question 21

Where is the lingual palpable?

Answer 21

through the oral mucosa

Question 22

What does the lingula nerve suspend in the floor of the mouth?

Answer 22

suspends the submandibular ganglion

Question 23

What does the lingula nerve carry?

Answer 23

general afferents from the anterior 2/3 of the tongue, the floor of the mouth and the lingual gums.

parasympathetic and special afferent (taste) fibers from the chorda tympani nerve.

Question 24

Where does the inferior alveolar nerve descend?

Answer 24

descends between the tensor veli palatini and the lateral pterygoid muscles and across the medial pterygoid muscle.

Question 25

Where does the inferior alveolar nerve pass after it descends?

Answer 25

between the sphenomandibular ligament and the ramus of the mandible and enters the mandibular foramen

Question 26

How does the inferior alveolar nerve travel in the body of the mandible?

Answer 26

Through the mandibular canal

Question 27

What does the inferior alveoli nerve form in the mandible?

Answer 27

dental plexus

Question 28

Where does the inferior alveoli nerve terminate?

Answer 28

xits the mandibular canal through the mental foramen and terminates on the chin

Question 29

What are the general efferent nerves of V3?

Answer 29

Nerve to the mylohyoid
Direct branches to the muscles of mastication
direct branches to the medial pterygoid muscle

Question 30

Where does the nerve to the mylohyoid pass?

Answer 30

general efferent branch that passes inferiorly in the mylohyoid groove to innervate the mylohyoid muscle and the anterior belly of the digastric

Question 31

What does the direct branches to the medial pterygoid muscle also supply?

Answer 31

tensor tympani muscle in the middle ear.