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Upper vs. Lower Motor Neuron
n/a
13
Anatomy
Undergraduate 2
10/02/2012
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Term
Lesion site on cortical motor neurons and their axons before synapses on spinal/cranial motor nuclei
 Definition
Upper Motor Neuron
Term
Lesion site on spinal/cranial nerves and their axons
 Definition
Lower Motor Neuron
Term
Spastic paralysis or weakness
 Definition
Upper Motor Neuron
Term
Flaccid paralysis or weakness
 Definition
Lower Motor Neuron
Term
Increased muscle tone
 Definition
Upper Motor Neuron
Term
Decreased muscle tone
 Definition
Lower Motor Neuron
Term
Muscle atrophy
 Definition
Lower Motor Neuron
Term
Fibrillations and fasciculations
 Definition
Lower Motor Neuron
Term
Hyperreflexia
 Definition
Upper Motor Neuron
Term
Hyporeflexia
 Definition
Lower Motor Neuron
Term
Babinski Reflex
 Definition
Upper Motor Neuron
Term
Affects multiple muscles or limbs
 Definition
Upper Motor Neuron
Term
Affects selected muscles or a single limb
 Definition
Lower Motor Neuron
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