A pitfall in magnetic stimulation for measuring central motor conduction time

An interesting electrophysiological study of patients with Hirayama disease using magnetic stimulation is published in the current issue of Clinical Neurophysiology. Zheng et al. (2017) measured two types of central motor conduction time (CMCT) in patients with Hirayama disease: one is CMCT using the F-wave technique (CMCTF) and another is CMCT using magnetic motor root stimulation (CMCTM) (Rossini et al. 2015). The authors compared CMCTF and CMCTM, and they showed that CMCTM was abnormally prolonged compared with CMCTF.

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