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. 2021 Jan 11;11:314. doi: 10.1038/s41598-020-79493-7

Figure 5.

Figure 5

Changes in VE during 33 Hz stimulation were inversely related to the stimulation threshold to evoke reflex EMG activity. In some cases stimulation testing, which was always conducted at 3 times threshold (3 T), led to direct (< 1 ms latency) external anal sphincter (EAS) EMG activation (indicated by outlines around markers).