Locations of CN

• Almost all CN are seen in

  Brain stem
• Brain step blood supply

  VBA
• Telencephalon

  CN 1
• Diencephalon

  CN 2
• Midbrain

  CN 3, 4
• Pons

  CN 5, 6, 7, 8
• Medulla oblongata

  CN 7, 8, 9, 10, 11, 12
• 7 and 8 both arises from Pons and Medulla oblongata, they are called

  Sensory intermedius
• When medulla oblongata passes through foramen magnum, it is now recognizes as the

  Spinal Cord
• Brain herniation happens at

  Medulla oblongata
• Brain stem stroke

  • Webber
  • Benedikt
  • Locked-in
  • Millard- gubbler
  • Wallenberg
• Medial, basal, midbrain

  Webber
• Tegmentum of the midbrain

  Bendikt
• Bilateral basal pons

  Locked-in
• Lateral pons

  Millard-gubler
• Lateral medulla

  Wallenburg/ PICA syndrome/ Vertebral artery
• S/sx:

  • Dysphagia
  • Horner's syndrome
  • Cross hemi- anaesthesia

  Wallenburg
• Loss of pain and temperature on IPSILATERAL FACE but loss of paint and temperature on the CONTRALATERAL BODY

  Cross hemi- anaesthesia
• CN 3

  Webber and Benedikt
• CN all in pons

  Locked-in
• CN 6, 7

  Millard gubler
• CN 5

  Wallenburg