Trigeminal Nerve Flashcards Preview

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Flashcards in Trigeminal Nerve Deck (25):
1

Where does the spinal nucleus of CN V located?

- Lower Pons
- Medulla
- Upper spinal cord

2

Where are the primary sensory and motor nuclei of CN V located?

- Middle pons

3

Where is the mesencephalic nucleus located?

- Upper pons and midbrain

4

What are the 3 portions of the trigeminal nerve?

V1: Opthalamic
V2: Maxillary
V3: Mandibular

5

What functional components does CN V have?

SVE
GVA

6

What is the GVA component of the trigeminal nerve?

- Sensory to face
- Oral cavity
- Dura mater of anterior and middle cranial fossa

7

What is the SVE of CN V?

- Muscles of mastication

8

What sensory information is processed in the mesencephalic nucleus of CN V?

- Proprioception

9

What information is processed by the chief nucleus of CN V?

- Somatosensory information to the face and head

10

What information is processed at the spinal nucleus of CN V?

- Pain and temperature of the face and head

11

What division of CN V is the only one containing motor fibers?

V3: Mandibular

12

What reflex travels through the motor nucleus of CN V?

- Jaw jerk

13

What types of fibers synapse on the mesencephalic nucleus?

Ia
Ib
II

14

What reflex travels through the mesencephalic nucleus?

Stretch reflex

15

What are the 3 parts of the spinal nucleus?

- Caudalis
- Interpolaris
- Oralis

16

Which part of the spinal nucleus is concerned with pain and temperature to the face?

- Caudalis

17

How is the caudalis portion of the spinal nucleus arranged somatotopically?

- V1 ventrolateral
- V3 dorsomedial

18

What does the interpolaris provide sensation to?

The teeth

19

What does the oralis provide sensation to?

Touch from mouth, lip, nose

20

What pain and temperature sensation does CN VII supply through CN V?

- External ear
- External auditory meatus
- Outer surface of ear drum

21

What pain and temperature sensation does CN IX supply through CN V?

- Ear
- Posterior 1/3 of tongue
- Auditory tube
- Upper pharynx

22

What pain and temperature sensation does CN X supply through CN V?

- Ear
- Lower pharynx
- Upper esophagus

23

What is trigeminal neuroalgia?

- Episodic paroxysmal pain of CN V distribution
- Mild stimuli cause pain ipsi-laterally to lesion

24

Describe the path of the ventral trigeminal thalamic tract.

- GVA from the face descend down to the spinal nucleus
- Projectional tract cells cross over and ascend up to thalamus

25

How do fibers from the muscles of mastication regular jaw jerk reflex?

- Collateral from proprioceptive fibers synapse on the motor nucleus