Descending Tracts

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  1. Corticospinal (anterior)
    Ipsilateral, voluntary, discrete, skilled motion
  2. Corticospinal (lateral)
    Contralateral, voluntary, fine motor
  3. Damage to corticospinal (pyramidal tracts)
    • + babinski
    • decreased abdominal reflex
    • decreased fine and skilled motor
  4. Retiuclospinal
    • Facilitate/inhibit, voluntary and reflexic activity through alpha and gamma motor neurons
    • I
  5. Rubrospinal
    • 1. Contra, gross postural tone
    • 2. Facilitate flexors
    • 3. Inhibit extensors
    • Opp of vestibulospinal
  6. Tectospinal
    • Contra, postural and muscle tone associated with auditory/ visual stimuli
    • C
  7. Vestibulospinal
    • 1. Ipsi, gross postural adjustment due to head movement
    • 2. Facilitate extensors
    • 3. Inhibit flexors
    • Opp of rubrospinal
  8. Damage of extrapyramidal tracts
    • 1. Paralysis
    • 2. Increased deep reflexes
    • 3. Clasp knife reaction (rigidity of extensors)
Author:
jldnpte
ID:
333342
Card Set:
Descending Tracts
Updated:
2017-08-07 16:33:08
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Descending Tracts
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Descending Tracts
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