Summary of the experimental groups, stimulation type and EMG recording set-up used in the study.

<p>Experimental groups are grouped by stimulation type (A, noxious stimulation – clinically required heel lance; B, tactile stimulation; C, punctate stimulation) and EMG recording set-up (ipsilateral or paired ipsi-contralateral). Schematic of the EMG recording set-up shown on left side of figure panel: ipsilateral (top), or paired ipsi¬contralateral (bottom); grey circles represent surface EMG electrode location over the infant limb.