Mnemonic

Cranial Nerve Order I to XII

Classic mnemonic for the order of the twelve cranial nerves.

Expansion

Oh Oh Oh To Touch And Feel Very Green Vegetables AH

Mnemonic

“Oh Oh Oh To Touch And Feel Very Good Velvet, Such Heaven”:

  • O - I Olfactory
  • O - II Optic
  • O - III Oculomotor
  • T - IV Trochlear
  • T - V Trigeminal
  • A - VI Abducens
  • F - VII Facial
  • V - VIII Vestibulocochlear
  • G - IX Glossopharyngeal
  • V - X Vagus
  • S - XI Spinal accessory
  • H - XII Hypoglossal

Only I and II arise from the forebrain and are truly central nervous system tracts rather than peripheral nerves, which is why the optic nerve is affected by multiple sclerosis and is surrounded by meninges and cerebrospinal fluid.

Expansion

  • O - Olfactory
  • O - Optic
  • O - Oculomotor
  • T - Trochlear
  • T - Trigeminal
  • A - Abducens
  • F - Facial
  • V - Vestibulocochlear
  • G - Glossopharyngeal
  • V - Vagus
  • A - Accessory
  • H - Hypoglossal