Cranial Nerves Flashcards Preview

First Aid: Neurology > Cranial Nerves > Flashcards

Flashcards in Cranial Nerves Deck (18)
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1

What are the names of these nerves?

  • CN I
  • CN II
  • CN III
  • CN IV
  • CN V
  • CN VI
  • CN VII
  • CN VIII
  • CN IX
  • CN X 
  • CN XI
  • CN XII

  • CN I - Olfactory nerve
  • CN II - Optic nerve 
  • CN III - Oculomotor nerve 
  • CN IV - Trochlear nerve
  • CN V - Trigeminal nerve 
  • CN VI - Abducens nerve 
  • CN VII - Facial nerve 
  • CN VIII - Vestibulocochlear nerve 
  • CN IX - Glossopharyngeal nerve 
  • CN X - Vagus nerve 
  • CN XI - Accessory nerve 
  • CN XII - Hypoglossal nerve 

2

What is the function of the Olfactory Nerve

Sensory or motor?

Smell

Sensory 

3

What is the function of the Optic Nerve?

Sensory or motor?

Sight

Sensory 

4

What is the function of the Oculomotor Nerve?

Sensory or motor?

  • Eye movement (SR, IR, MR, IO)
  • Pupillary constriction (sphincter pupillae: Edinger-Westphal nucleus, muscarinic receptors)
  • Accomodation
  • Eyelid opening (levator palpebrae)
  • Motor 

5

What is the function of the Trochlear Nerve?

Sensory or Motor?

Eye movement (SO)

Motor 

6

What is the function of the Trigeminal Nerve?

Sensory or Motor?

  • Mastication
  • Facial sensation (ophthalmic, maxillary, mandibular divisions)
  • Somatosensation: anterior 2/3 of tongue 
  • Both 

7

What is the function of the Abducens Nerve?

Sensory or Motor?

Eye movement (LR)

Motor 

8

What is the function of the Facial Nerve?

Sensory or Motor?

  • Facial movement 
  • Taste: anterior 2/3 of tongue
  • Lacrimation
  • Salivation (submandibular, sublingual glands)
  • Eyelid closing (orbicularis oculi)
  • Stapedius muscle in ear 
  • Both 

9

What is the function of the Vestibulocochlear Nerve?

Sensory or Motor?

Hearing, balance

Sensory 

10

What is the function of the Glossopharyngeal nerve?

Sensory or Motor?

  • Taste & somatosensation from posterior 1/3 of tongue
  • Swallowing
  • Salivation (parotid gland)
  • Monitoring carotid body & sinus chemo- & baroreceptors
  • Stylopharyngeus (elevates pharynx, larynx) 
  • Both 

11

What is the function of the Vagus Nerve?

Sensory or Motor?

  • Taste from epiglottic region
  • Swallowing 
  • Soft palate elevation
  • Midline uvula
  • Talking
  • Coughing
  • Thoracoabdominal viscera
  • Monitoring aortic arch chemo- & baroreceptors
  • Both 

12

What is the function of the Accessory Nerve?

Sensory or Motor?

  • Head turning 
  • Shoulder shrugging (SCM, trapezius)
  • Motor

13

What is the function of the Hypoglossal Nerve?

Sensory or Motor?

Tongue movement 

Motor 

14

Corneal Reflex 

  • Afferent
  • Efferent 

  • Afferent: V1 ophthalmic (nasociliary branch)
  • Efferent: VII (temporal branch: orbicularis oculi)

15

Lacrimation Reflex 

  • Afferent
  • Efferent 

  • Afferent: V1 
  • Efferent: VII

16

Jaw Jerk Reflex 

  • Afferent
  • Efferent 

  • Afferent: V3 (sensory - muscle spindle from masseter)
  • Efferent: V3 (motor - masseter) 

17

Pupillary Reflex 

  • Afferent
  • Efferent 

  • Afferent: II
  • Efferent: III

18

Gag Reflex 

  • Afferent
  • Efferent 

  • Afferent: IX
  • Efferent: X