BrainStem and Cranial Nerves Lecture

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tjminnie
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170345
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BrainStem and Cranial Nerves Lecture
Updated:
2012-09-11 22:49:52
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Brainstem
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Something is wrong with you medulla oblongata
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  1. What are the general neurological functions mediated in the brainstem?
    • Necessary for:
    • Survival  (Breathing, digestion, HR, BP)
    • & Arousal (being awake and alert)
  2. What cranial nerves emerge from the brainstem?
    CN 3-12 all do
  3. What must ALL ascending and descending fiber tracts pass through?
    • Must pass through brainstem.
    • From peripheral nerves and spinal cord to a higher center.
  4. What are the divisions of the Brainstem?
    • Midbrain
    • Pons
    • Medulla Oblongata
  5. What is the loation of the brainstem?
    posterior cranial fossa
  6. What are the boundaries (rostral and caudal) of the BS?
    From Midbrain-diencephalic junction at the tentorium cerebelli to the cervicomedullary junction at the foramen magnum
  7. What CN(s) emerge from the forebrain?
    • I -olfactory
    • II - optic
  8. What CN(s) emerge from the midbrain?
    • III - occulomotor
    • IV - trochlear
  9. What CN(s) emerge from the pons?
    V - trigeminal
  10. What CN(s) emerge from the pontomedullary junction?
    • VI - Abducens
    • VII - Facial
    • VIII - Vestibulocochlear
  11. What CN(s) emerge from the medulla oblongata?
    • IX - glossopharyngeal
    • X - Vagus
    • XI - Spinal Accessory
    • XII - Hypoglossal
  12. What CN(s) leave the POST BS?
    • IV - trochlear
    • Posterior Pons
  13. What is the most rostal and caudal portions of the center of the pons called?
    • Rostral - Cerebral aqueduct
    • Caudal - obex
  14. What is the relationship between the vagal and hypoglossal trigone?
    Hypoglossal is medial and superior to the vagal trigone
  15. Where is the 4th ventrical located in the BS?
    In the Pons
  16. What landmarks are on the Anterior side of the midbrain?
    • Tegmentum - Cerebral peduncles
    • &
    • interpeuncular fossa
  17. What landmarks are on the POST side of the midbrain?
    Tectum (superior and INF colliculi)
  18. What forms the tectum?
    The superior and inferior colliculi
  19. The is the ANT side of the Pons called?
    Basis Pontis
  20. What is the POST side of the Pons?
    4th ventricle
  21. What is on the dorsolateral Pons
    • CereBELLar peduncles
    • (SUP, Middle, INF)
  22. What is on the Anterior side of the Medulla oblongata?
    • Pyramids and pyramidal Decussation
    • Olives
  23. What is on the POST side of the Medulla Oblongata?
    Ncli/ fasciculi Cuneatus / gracilis
  24. What CN(s) exit through the cribiform plate?
    I - olfactory
  25. What CN(s) exit through the optic canal
    II - Optic nerve
  26. What CN(s) exit through the superior orbital fissure
    • III - occulomotor
    • IV - trochlear
    • V1 -opthalmic portion of Trigeminal
    • VI - abducens
  27. What CN(s) exit through the foramen rotundum
    V2 - Maxillary portion of Trigeminal
  28. What CN(s) exit through the Foramen Ovale
    V3 - Mandibular portion of Trigeminal
  29. What CN(s) exit through the auditory canal
    • VII - Facial (to face through the stylomastoid foramen)
    • VIII - vestibulocochlear
  30. What CN(s) exit through the Jugular foramen?
    • IX - glossopharyngeal
    • X - Vagus
    • XI - Spinal Accessory
  31. What CN(s) exit through the Hypoglossal canal?
    XII - hypoglossal

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