Neuro #29 Spinal Systems.txt

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Author:
kepling
ID:
78924
Filename:
Neuro #29 Spinal Systems.txt
Updated:
2011-04-11 17:47:40
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Neuro Spinal Systems
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Neuro #29 Spinal Systems
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  1. Which of the following provide Flexor movement?: MLF, Vestibulospinal, Medial/Lateral reticulospinal, Rubrospinal tracts
    Rubrospinal: the rest affect extensors
  2. What, specifically, does the Vestibulospinal Tract act on?
    Upper limb
  3. Is the vestibulospinal tract ispi/contralatera?
    Ipsilateral
  4. Does the vestibulospinal tract receive cortical input?
    No
  5. What activates the vestibulospinal tract?
    • Fastigial nuclei
    • Vestibular input
  6. What are other names for medial/lateral reticulospinal tracts? functions?
    • Medial: Pontine, excite
    • Lateral: Medullary, inhibit
    • **Named for origin
  7. Along with extensor information, what other info is carried through the medial reticulospinal system?
    ALS Pain
  8. Does the Reticulospinal system receive cortical input?
    Yes
  9. What is the function of the Rubrospinal tract?
    Excite flexors of upper limb
  10. Does the rubrospinal system receive cerebral cortical or nuclear input?
    Both
  11. What is decorticate posture?
    Arms flexed, legs extended
  12. What is decerebrate posture?
    All limbs extended
  13. What is the main tract driving decerebrate deficits? Why?
    Medial Reticulospinal Tract (Pontine) b/c of ALS pain fibers
  14. What neuron is activated by the Medial reticulospinal tract (Pontine)?
    Extensor gamma
  15. What neuron is activated by the Rubrospinal tract?
    Flexor gamma
  16. What occurs clinically if there is a hemorrhage from the cortex that enters that brainstem?
    Movement from decorticate to decerebrate posture

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