Cranial nerves

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Last updated 2:38 AM on 6/19/26
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12 Terms

1
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CN 1- Olfactory

  • Sensory

  • Fxn: sense of smell

  • Affected: Anosmia

2
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CN 2- Optic

  • Sensory

  • Fxn: vision: color, acuity, periphery vision, pupillary light reflex

  • Affected: blindness, myopia, presbyopia

3
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CN 3- Occulomotor

  • Motor

  • Fxn: movement (up, down, in, up & in), opens eyelids, constricts pupils

  • Affected: Strabismus (lateral), ptosis, dilation of pupils

4
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CN 4- Trochlear

  • Motor

  • Fxn: looking down & in (superior oblique)

5
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CN 5- Trigeminal

  • Mixed

  • Fxn: sensation to face, corneal reflex (afferent), sensation to anterior 2/3 of tongue, dampens sounds, jaw jerk, chewing

6
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CN 6- Abducens

  • Motor

  • Fxn: looks out (lateral rectus)

  • Affected: medial strabismus

7
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CN 7- Facial

  • Mixed

  • Fxn: Corneal reflex (efferent), taste to anterior 2/3rd of tongue, dampens sounds, lacrimation, salivation

8
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CN 8- Vestibulocochlear

  • Sensory

  • Fxn: Balance and hearing

9
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CN 9- Glossopharyngeal

  • Mixed

  • Fxn: gag reflex (afferent), posterior (1/3) tongue sensation and taste

10
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CN 10- Vagus

  • Mixed

  • Fxn: Gag reflex (efferent), deviation of uvula

11
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CN 11- Hypoglossal

  • Motor

  • Fxn: moves tongue (lick your lesion- tongue deviates towards side of lesion)

12
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CN 12- Accessory

  • Motor

  • Fxn: Innervation of Trap/ SCM (SB same, Rot Opp)