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Flashcards in Nerves Deck (31)
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1

What is the largest division of the trigemenal nerve?

the mandibular division V3

2

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

the foramen Ovale

3

What does the V3 nerve carrying with it?

general afferents
general efferents

4

Where are the general afferents from?

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.

5

What are the general efferents going?

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).

6

What are the parasympathetic ganglia the V3 nerve suspend?

otic
submandibular

7

What special afferent fibers does V3 carry?

taste from anterior 2/3 tongue to facial nerve 7

8

What are the general afferent branches of V3?

Mennungal branch
Buccal nerve
auriculotemporal nerve
lingual nerve
inferior alveolar nerve

9

Where does the menningal afferent branch of V3 enter?

middle cranial fossa

10

How does the menningal branch get into the cranial fossa?

Foramen spinosum
enters with menningal artery

11

What does the menningal branch carry with it?

general afferents from the dura of the middle cranial fossa

12

Where does the buccal nerve pass?

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

13

What does the buccal nerve carry?

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

14

Where does the auriculotemporal nerve originate?

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

15

Where does the auriculotemporal nerve continue posteriorly?

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

16

Where does auriculotemporal ascends to?

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

17

What does the auriculotemporal nerve carry with it?

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.

18

Where does the lingual nerve descend?

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

19

where does the lingual pass after it descends?

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

20

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

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

21

Where is the lingual palpable?

through the oral mucosa

22

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

suspends the submandibular ganglion

23

What does the lingula nerve carry?

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.

24

Where does the inferior alveolar nerve descend?

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

25

Where does the inferior alveolar nerve pass after it descends?

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

26

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

Through the mandibular canal

27

What does the inferior alveoli nerve form in the mandible?

dental plexus

28

Where does the inferior alveoli nerve terminate?

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

29

What are the general efferent nerves of V3?

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

30

Where does the nerve to the mylohyoid pass?

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