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Flashcards in Trigeminal Nerve 2 Deck (46)
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1

what is the course of the Mandibular Division of CNV?

CNV3 passes through the foramen ovale & into the infratemporal fossa

2

where is the foramen ovale located?

base of the greater wing of the sphenoid

3

what is the lateral boundary of the infratemporal fossa?

ramus of the mandible

4

what boundary lies medially to the infratemporal fossa?

lateral pterygoid plate of sphenoid bone

5

what is the anterior boundary of the infratemporal fossa?

posterior aspect of the maxilla

6

what boundaries lie posteriorly to the infratemporal fossa?

- tympanic plate
- mastoid process
- styloid process

7

what is the superior boundary of the infratemporal fossa?

infratemporal crest of sphenoid bone

8

what is the inferior boundary of the infratemporal fossa?

angle of the mandible

9

what is interesting about the mandibular division of the trigeminal nerve, differing it from the other divisions?

it has 3 trunks

10

what are the main branches of the mandibular division of the trigeminal nerve?

- auriculotemporal
- buccal
- mental
- lingual
- muscular

11

what are the different trunks of the mandibular division known as?

- main trunk
- anterior trunk
- posterior trunk

12

what nerves come from the Main Trunk of the Mandibular Division of CNV? note if they are motor or sensory:

- meningeal branch (sensory)
- branch to tensor tympani (motor)
- branch to tensor veli palatini (motor)
- nerve to medial pterygoid (motor)

13

where does the sensory meningeal nerve innervate?

dura mater

14

what nerves arise from the Anterior Trunk of the Mandibular Division of CNV? are they motor or sensory?

- deep temporal nerves (motor)
- nerve to lateral pterygoid (motor)
- masseteric nerve (motor)
- buccal nerve (*sensory)

15

what nerves arise from the Posterior Trunk of the Mandibular Division of CNV? are they motor or sensory?

- auriculotemporal nerve (sensory)
- lingual nerve (sensory)
- inferior alveolar nerve (MIXED motor & sensory)

16

what are the areas of distribution of the mandibular division?

- auricle
- temple
- cheek (posteriorly or laterally)
- lower lip
- chin
- floor of mouth & lower teeth
- anterior 2/3 tongue

17

where does the auriculotemporal nerve innervate? what type of innervation does this nerve supply?

sensory innervation to posterior temple/side of head

18

where does the buccal nerve innervate? what type of innervation does this nerve supply?

sensory innervation to the lateral posterior area of the cheek & posterior buccal gingivae of molars

19

where does the mental nerve innervate? what type of innervation does this nerve supply?

sensory innervation to the lower lip & buccal gingivae of anterior teeth (premolar onwards)

20

what nerve does the mental nerve arise from?

a branch of the inferior alveolar nerve (posterior trunk)

21

where does the mental nerve emerge?

the mental foramen

22

what disorder may cause terrible pain to arise in CNV3? (occasionally in CNV2 as well)

trigeminal neuralgia

23

what Trunk of the Mandibular Division supplies general sensory innervation to the oral cavity?

posterior trunk

24

what nerve supplies sensory innervation to the cheek & posterior buccal gums?

buccal nerve

25

what nerve supplies the lower posterior teeth? (from molars up to second premolar)

main trunk of inferior alveolar nerve

26

what nerve supplies the lower anterior teeth? (1st premolar to central incisor)

incisive branch of inferior alveolar nerve

27

what nerve supplies the skin of chin & lower lip, as well as anterior buccal gingivae?

mental nerve branch of the inferior alveolar nerve

28

what is interesting about the inferior alveolar nerves innervation?

before entering the mandibular foramen, the inferior alveolar nerve fibres are MIXED (both sensory and motor)

29

what occurs before the mixed inferior alveolar nerve enters the mandibular foramen?

a branch splits off, this is the nerve to mylohyoid (MOTOR FIBRES)

30

when the inferior alveolar nerve enters the mandibular division, how does its innervation change?

only SENSORY innervation once it enters the spongy bone (through mandibular foramen)