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Representative examples are shown of EMG activity evoked in the gastrocnemius muscles of a normal rat (A) and of no EMG activity evoked in an injured rat of the Control group (B) by the tcMMEP procedure. A stimulus artifact (chevron) can be seen at the beginning of each waveform in both examples. The onset latency and peak-to-peak amplitude (arrows) of the EMG activity recorded in the normal rat (A) were 5ms and 11.2mV, respectively.
