Linear regression of per cent change scores for SEPs and MEPs relative to baseline A) during pain (across the 5 recording blocks), B) as pain returned to zero, C) 15 minutes and D) 25 minutes after pain had resolved.

<p>A larger reduction in the size of the SEP was associated with a larger reduction in the size of the MEP when pain was present (P<0.001, r² = 0.22).