D wave stimulus parameters
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50-500usec single pulse
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C3-4 stimulates entire motor axis
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Need maximal amplitude response for bilateral pathway
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increased until leftward shift in wave=deepest activation and
until wave doesn't increase in amplitude
Stimulating intensity for case=whatever intensity was just below
that leftward shift
can activate each side preferentially by anodal stimulation but
evidence is lacking
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2hz, 2-4 averaged responses
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do one of each polarity 3/4, 4/3
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100-3000hz