Home
Flashcards
Preview
bms 1
Home
Get App
Take Quiz
Create
Brain stem
controls autonomic behaviors necessary for survival
connects brain to spinal cord
Brain stem lesions
spinal lesion
lesion below midbrain
lesion above midbrain
spinal lesion
spinal shock
---muscles become flaccid then spastic
--- reflexes slowly return
cant stand or support weight
lesion below spinal cord
increase muscle tone
positive supportive reflex (can stand but rigid)
lesion above spinal cord
show positive supportive reflex, righting reflex, waking reflex
Basal Ganglia
subconscious control of skeletal muscle control
help coordinate learned movement patterns
Basal Ganglia pathways
direct
indirect
Direct Pathway
↑ motor activity by-
---decreasing inhibition to thalamic nuclei
---increase excitation of motor cortex
Indirect Pathway
↓ motor activity by-
---increasing inhibition to thalamus
--- decrease excitation to motor cortex
Dopamine
increase movement
Ach
Decrease movement
Parkinson’s
destruction of dopaminergic neurons leads to bradykinesia
-- decrease dop decreases movement
cholinergic neurons not affected further decreasing movement
Parkinson’s Signs/Symptoms
resting tremor
rigidity
postural instability
bradykinesia/akinesia
Huntington’s
destruction of cholinergic neurons
decreasing IP and therefore increasing motor activity
Huntington’s Signs/Symptoms
dementia
chorea (uncontrolled rapid movements)
Author
pugsrule915
ID
252805
Card Set
bms 1
Description
bms 1
Updated
12/12/2013, 3:04:18 PM
Show Answers
Home
Flashcards
Preview