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. 2018 Aug 15;38(33):7237–7247. doi: 10.1523/JNEUROSCI.0545-18.2018

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Copyright © 2018 the authors 0270-6474/18/387237-11$15.00/0

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Figure 6. — Paired-pulse SSEP suppression within the S1. A, Raw SSEP traces showing paired-pulse SSEP suppression of the N20/P25 in the S1 in a representative subject during index finger abduction (blue), precision (gray), and power grip (orange) at 30% of MVC at an ISI of 40 ms. The amplitude of the N20/P25 component (A1 and A2, see Materials and Methods) is marked. Each waveform represents the average of 300 SSEPs. B, Group data show mean paired-pulse ratios (A2/A1) during index finger abduction (blue), precision (gray), and power grip (orange). Paired-pulse SSEP suppression of the N20/P25 was increased during power grip compared with index finger abduction and precision grip, suggesting that intracortical inhibition in the S1 was increased. C, Data from individual subjects are also shown. Error bars indicate SE *p < 0.05, comparison between motor tasks; ^¥p < 0.05, comparison between test SSEP and conditioned SSEP at each task.