bms 1

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  1. Brain stem
    • controls autonomic behaviors necessary for survival
    • connects brain to spinal cord
  2. Brain stem lesions
    • spinal lesion
    • lesion below midbrain
    • lesion above midbrain
  3. spinal lesion
    • spinal shock
    • ---muscles become flaccid then spastic
    • --- reflexes slowly return
    • cant stand or support weight
  4. lesion below spinal cord
    • increase muscle tone
    • positive supportive reflex (can stand but rigid)
  5. lesion above spinal cord
    show positive supportive reflex, righting reflex, waking reflex
  6. Basal Ganglia
    • subconscious control of skeletal muscle control
    • help coordinate learned movement patterns
  7. Basal Ganglia pathways
    • direct
    • indirect
  8. Direct Pathway
    • ↑ motor activity by-
    • ---decreasing inhibition to thalamic nuclei
    • ---increase excitation of motor cortex
  9. Indirect Pathway
    • ↓ motor activity by-
    • ---increasing inhibition to thalamus
    • --- decrease excitation to motor cortex
  10. Dopamine
    increase movement
  11. Ach
    Decrease movement
  12. Parkinson’s
    • destruction of dopaminergic neurons leads to bradykinesia
    • -- decrease dop decreases movement
    • cholinergic neurons not affected further decreasing movement
  13. Parkinson’s Signs/Symptoms
    • resting tremor
    • rigidity
    • postural instability
    • bradykinesia/akinesia
  14. Huntington’s
    • destruction of cholinergic neurons
    • decreasing IP and therefore increasing motor activity
  15. Huntington’s Signs/Symptoms
    • dementia
    • chorea (uncontrolled rapid movements)

Card Set Information

Author:
 pugsrule915
ID:
 252805
Filename:
 bms 1
Updated:
2013-12-12 15:04:18
Tags:
bms
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Description:
bms 1
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