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Which of the following provide Flexor movement?: MLF, Vestibulospinal, Medial/Lateral reticulospinal, Rubrospinal tracts
Rubrospinal: the rest affect extensors
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What, specifically, does the Vestibulospinal Tract act on?
Upper limb
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Is the vestibulospinal tract ispi/contralatera?
Ipsilateral
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Does the vestibulospinal tract receive cortical input?
No
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What activates the vestibulospinal tract?
- Fastigial nuclei
- Vestibular input
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What are other names for medial/lateral reticulospinal tracts? functions?
- Medial: Pontine, excite
- Lateral: Medullary, inhibit
- **Named for origin
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Along with extensor information, what other info is carried through the medial reticulospinal system?
ALS Pain
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Does the Reticulospinal system receive cortical input?
Yes
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What is the function of the Rubrospinal tract?
Excite flexors of upper limb
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Does the rubrospinal system receive cerebral cortical or nuclear input?
Both
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What is decorticate posture?
Arms flexed, legs extended
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What is decerebrate posture?
All limbs extended
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What is the main tract driving decerebrate deficits? Why?
Medial Reticulospinal Tract (Pontine) b/c of ALS pain fibers
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What neuron is activated by the Medial reticulospinal tract (Pontine)?
Extensor gamma
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What neuron is activated by the Rubrospinal tract?
Flexor gamma
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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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