Neurographic Analysis of Trains of Frequent Electric Stimuli in the Diagnosis of Peripheral Nerve Diseases

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Abstract
Results of electromyographic and neurographic investigations in 19 patients with 24 carpal tunnel syndromes (CTS) were compared with the results obtained from 19 healthy control persons. Investigating conventional neurographic and electromyographic parameters significant changes of electrophysiological data have been registered in only a part of CTS. Stimulating the median nerve sensory fibres with short trains of ten supramaximal 100–500 cps electric stimuli and neurographic recording provided more distinct information. The relative amplitude of the tenth action potential response of each train was significantly more reduced in the patients than in the control nerves and the respective latencies were significantly prolonged in CTS (p

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