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Abstract
polyneuropathy occurs with a combination of multiple symptoms, signs,
and abnormal electrodiagnostic studies so electrophysiological examination should always be done to avoid underestimating peripheral
neuropathy.
Autonomic disturbance can be assessed by recording PASP even in subclinical conditions. Also it gives a quantitative data about the degree
of damage of descending sympathetic fibers so that it will be very
helpful for early diagnosis of autonomic dysfunction