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UMN syndrome vs. LMN syndrome
N/A
16
Anatomy
Undergraduate 2
09/26/2012
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Term
upper
 Definition
lesion site: cortical motor neurons and their axons before synapses on spinal/cranial motor nuclei
Term
upper
 Definition
paralysis (spastic) or weakness
Term
upper
 Definition
increased muscle tone
Term
upper
 Definition
no muscle atrophy
Term
upper
 Definition
no twitching or fasticulation
Term
upper
 Definition
hyperreflexia
Term
upper
 Definition
babinski and hoffman 
Term
upper
 Definition
multiple muscles or limbs (monoplegia, hemiplegia, or quadriplegia)
Term
lower
 Definition
lesion site: spinal/cranial motor neurons and their axons
Term
lower
 Definition
paralysis (flaccid) or weakness
Term
lower
 Definition
decreased muscle tone
Term
lower
 Definition
muscle atrophy present
Term
lower
 Definition
fibrillations and fasciculations
Term
lower
 Definition
hyporeflexia
Term
lower
 Definition
no abnormal reflexes
Term
lower
 Definition
limb involvement: a single limb or selected muscles
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