Fig. 2

Normalized power spectral density (PSD) of the EMG envelope (resulting from power spectra averaged across homologous muscles and subjects and normalized to total power) for different muscles (GM gastrocnemius, TA tibialis anterior, RF rectus femoris, BF biceps femoris) and frequencies in patients with Dystrophic Myotonia type 1 (DM1) and healthy controls (HC)