3.1 Cranial Nerves Flashcards Preview

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Flashcards in 3.1 Cranial Nerves Deck (59)
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1

What is the cranial exit of CN I?

Cribriform plate

2

What is the cranial exit of CN II?

Optic canal

3

What is the cranial exit of CN III?

Superior orbital fissure

4

What is the cranial exit of CN IV?

Superior orbital fissure

5

What is the cranial exit of CN V1?

Superior orbital fissure

6

What is the cranial exit of CN V2?

Foramen Rotundum

7

What is the cranial exit of CN V3?

Foramen Ovale

8

What is the cranial exit of CN VI?

Superior orbital fissure

9

What is the cranial exit of CN VII?

Internal acoustic meatus

10

What is the cranial exit of CN VIII?

Internal acoustic meatus

11

What is the cranial exit of CN IX?

Jugular Foramen

12

What is the cranial exit of CN X?

Jugular Foramen

13

What is the cranial exit of CN XI?

Jugular Foramen

14

What is the cranial exit of CN XII?

Hypoglossal canal

15

What is the origin of somatic motor fibers that innervate the skeletal muscles of the face and neck?

cranial nerve motor nuclei

16

What cranial nerves also have parasympathetic nuclei?

CN III, VII, IX, X

17

Postganglionic parasympathetic fibers reach their end organs by hitch-hiking along branches of what nerve?

CN V

18

What are the fiber type(s) of CN I?

  • Special sensory - Smell

 

19

What are the fiber type(s) of CN II?

  • Special sensory - Vision

20

What are the fiber type(s) of CN III?

  • Somatic motor:
    • Superior Div - SR, LPSE
    • Inferior Div - MR, IR, IO
  • Visceral motor - Sphincter pupillae and cilliaris mm

21

What are the fiber type(s) of CN IV?

  • Somatic motor - Superior oblique

22

What are the fiber type(s) of CN V1?

  • Somatic sensory - orbital and forehead regions 

 

23

What are the fiber type(s) of CN V2?

  • Somatic sensory - Maxillary region

24

What are the fiber type(s) of CN V3?

  • Somatic sensory:
    • Mandibular region, anterior 2/3 tongue, external ear, and tympanic membrane
  • Somatic motor: 
    • Mm of mastication: tensor veli palatini, tensor tympani, mylohyoid, ant belly digastric 

25

What are the fiber type(s) of CN VI?

  • Somatic motor - Lateral Rectus

26

What are the fiber type(s) of CN VII?

  • Somatic motor
    • mm of facial expression:
      • Temporalis via temporal branches
      • Orbicularis Oculi via zygomatic 
      • Platysma m via cervical branch
      • Buccinator m. via Buccal branches
      • Depressors of lower lip and angle of mouth via Marginal mandibular 
    •  Stylohyoid, post belly digastric, stapedius
  • Somatic sensory - External ear
  • Special sensory - Taste ant 2/3 tongue
    • Chorda tympani n. 
  • Visceral motor - Submandibular, sublingual, lacrimal, palatal, and nasal glands 
    • Greater petrosal n. --> n. of pterygoid canal

27

What are the fiber type(s) of CN VIII?

  • Special Sensory:
    • Cochlear n. - hearing
    • Vestibular n. - balance

28

What are the fiber type(s) of CN IX?

  • Somatic motor - Stylopharyngeus . 
  • Visceral motor - Parotid gland via lesser petrosal n. 
  • Visceral sensory - Carotid body (chemo) and sinus (baro) 
  • Somatic sensory - External ear, posterior 1/3 tongue, pharynx, tympanic membrane
  • Special sensory - Taste post 1/3 tongue

29

What are the fiber type(s) of CN X?

  • Somatic motor - Pharyngeal mm (EXCEPT stylopharyngeus), laryngeal mm, palatal mm (EXCEPT tensor veli palatini)
  • Visceral motor - Trachea, bronchi, heart cardiac m, digestive tract until left colic flexture
  • Visceral sensory - Pharynx, larynx, trachea, bronchi, heart, digestive tract until left colic flexure
  • Somatic sensory - External ear
  • Special sensory - Taste from epiglottis 

30

What are the fiber type(s) of CN XI?

  • Somatic motor - SCM, trapezius