cranial nerve

• 12 cranial nerves

  • CN1 - olfactory
  • CN2 - optic nerve
  • CN3 - occulomotor
  • CN4 - trochlear
  • CN5 - trigeminal
  • CN6 - abducens
  • CN7 - facial
  • CN8 - acoustic (vestribulocochlear)
  • CN9 - glossopharyngeal
  • CN10 - vagus
  • CN11 - spinal accesory
  • CN12 - hypoglossal
• sensory nerves - olfactory, optic nerve, acoustic
• motor nerves - occulomotor, trochlear, abducens, spinal accessory, hypoglossal
• sensory and motor nerves - trigeminal, facial, glossopharyngeal, vagus
• olfactory

  • smell
  • assessment: smell test
• optic nerve

  • sight
  • assessment: snellen chart or jaeger's reading card
• occulomotor trochlear abducens

  • contracts eye muscle and constric pupils
  • assessment: extraoccular eye movement and perrla
• PERRLA means pupils are round, equal, and reactive to light and accomodation
• trigeminal

  • sensory of pain, touch, and temperature ; jaw movement
  • assessment: temporal and muscle palpation, sensory test (paper clip), corneal reflex test
• facial

  • taste, tears and facial expressions
  • assessment: taste test and facial movements
• acoustic

  • for hearing and balance
  • assessment: weber, rinne's, whisper, and romberg's test
• glossopharyngeal, vagus

  • poerterior third of tongue and gag reflex
  • assessment: check movement of uvula, gag reflex, swallowing ability
• spinal accessory

  • head rotation and shoulder movements
  • assessment: shoulder and head resistance
• hypoglossal

  • innervation of tongue muscle
  • assessment: tongue movement