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. 2015 Dec 23;3(12):e12656. doi: 10.14814/phy2.12656

Figure 7.

Figure 7

Examples of electromyographic (EMG) traces showing activity bursts and reduced electrical activity in gastrocnemius. Wild type: activity burst with a single (A) and several (B) high EMG spikes. Hyperkalemic periodic paralysis (HyperKPP): (C) activity burst with similar EMG activity before and after the burst (notice the larger EMG range for HyperKPP (C) compared to wild type (A, B)); (D) activity bursts with reduced EMG activity between bursts, with a 1 sec segment is amplified to better show the extent of the decrease in EMG, vertical bar 20 lV, horizontal bar 0.2 msec; (E) large EMG signals followed by a reduced EMG activity; (F) prolonged activity bursts. Arrows indicate the start and end of an activity burst.