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cranial nerves 2 and 3
cranial nerves 2 and 3
   Primary function: special sensory (vision)
   Origin: axons of retinal cells
   Pass through: optic canal (ant cranial fossa)
   Destination: diencephalon through optic
    chiasm
cranial nerves 2 and 3
cranial nerves 2 and 3
Retina optic nerve optic chiasma  optic

tract lat geniculate body optic radiation 

visual area of occipital lobe
cranial nerves 2 and 3
   Primary function: motor (eye movements)
   Origin: mesencephalon
   Pass through: superior orbital fissure
   Destination:
    ◦ Somatic motor : superior, inferior and medial
      rectus, inferior oblique, and levator palpebrae
      superioris muscle.
    ◦ Visceral motor: intrinsic eye muscles
   GSE: extra ocular muscles
   GVE: intra ocular muscles for contraction of
    pupil and accomodation
   GSA: extra ocular muscles
cranial nerves 2 and 3
cranial nerves 2 and 3
cranial nerves 2 and 3
•PTOSIS
•LATERAL SQUINT
•PUPILLARY DILATATION
•LOSS OF ACCOMODATION
•DIPLOPIA

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cranial nerves 2 and 3

  • 3. Primary function: special sensory (vision)  Origin: axons of retinal cells  Pass through: optic canal (ant cranial fossa)  Destination: diencephalon through optic chiasm
  • 6. Retina optic nerve optic chiasma  optic tract lat geniculate body optic radiation  visual area of occipital lobe
  • 8. Primary function: motor (eye movements)  Origin: mesencephalon  Pass through: superior orbital fissure  Destination: ◦ Somatic motor : superior, inferior and medial rectus, inferior oblique, and levator palpebrae superioris muscle. ◦ Visceral motor: intrinsic eye muscles
  • 9. GSE: extra ocular muscles  GVE: intra ocular muscles for contraction of pupil and accomodation  GSA: extra ocular muscles