ch 14 cranial nerves.txt

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ch 14 cranial nerves.txt
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2010-12-11 16:15:16
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cranial nerves
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  1. brain lobes
    • makes up the cerebrum
    • 1. frontal
    • 2. parietal
    • 3. temporal
    • 4 occipital
  2. role of frontal
    thought process/personality
  3. role of temporal
    hearing
  4. role of occipital
    visual cortex
  5. role of parietal
    Broca's area/speech
  6. Broca's area
  7. Midbrain
    extends from pons to diancephelon
  8. diencephalon,
    superior to the midbrain, consists of the thalamus, hypothalamus and epithalamus
  9. CerebroSpinalFluid
    clear liquid that protects brain and spinal cord from chem & physical injuries
  10. Brain stem
    • consists of
    • 1. medulla oblongata
    • 2. pons
    • 3. reticular formation
  11. role of medulla oblongata
    involved in respiratory and other visceral actions, such as organ movement. Also aids in balance
  12. role of pons
    controls organs and respitory
  13. role of reticular formation
    aids in SLEEP cycle - injury to this causes a COMA
  14. role of cerebellum
    • controls balance
    • aids in fine motor movements, ie writing
    • aids in learning physical movements, ie basketball players utilize this to play well
  15. Cranial nerves
    • 12 pair in total, there are two more that are under discussion
    • cranial nerve 0 and cranial nerve 13
  16. possible role of cranial nerve 0
    sexual stimulation, sensory
  17. possible role of cranial nerve 13
    glossal nerve, mainly motor, for speech articulation
  18. CN1 - olfactory nerve
    • sensory
    • transmits sense of SMELL
  19. CN2 - optic nerve
    • sensory
    • in the RETINA of each eye joint
    • transmits visual info
  20. CN3 - oculomotor nerve
    • motor
    • EXTRINSIC eye muscle to control movement of upper eyeball and upper eyelid
    • originates in midbrain
  21. CN4 - trochlear nerve
    • motor
    • aids in eyeball movement
    • originates in midbrain
  22. CN5 - Trigeminal nerve
    • mixed (sensory and motor)
    • 3 sensations:
    • V1 - orbital (opthalmic)
    • V2 - maxillary
    • V3 - mandibular
    • Motor: these axons supply muscles of mastication
  23. CN6 - Abducens nerve
    • motor
    • movement of the eye, causes ABDUCTION of eyeball (lateral rotation)
    • originares in PONS
  24. CN7 - facial nerve
    • mixed (sensory and motor)
    • sensory extends from tastebuds to anterior 2/3 of tongue
    • motor helps with facial expressions
  25. CN8 - vestibularcochlear nerve
    • sensory
    • aids in hearing and balance, gravity and rotation
    • cochlear branch carries hearing impulses
  26. CN9 - Glossoppharyngeal nerve
    • mixed (sensor and motor)
    • sensory aids in TASTE from posterior 1/3 of tongue
  27. CN10 - Vagus nerve
    • mixed (sensory and motor)
    • sensory deals with stretching and proprioception
    • motor aids in visceral motor and control of body organs
  28. CN11 - Accessory nerve
    • motor
    • aids in back movement of vertebrae, sternocleidomastoid and trapezius
  29. CN12 - Hypoglossal
    • Motor
    • aids in movement of the tongue during speech and swallowing

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