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Experimental procedure. Schematic representation of the experimental procedure during EEG acquisition. A. Experimental setting. A familiar caretaker (holder) held the capped infant monkey in front of a second experimenter who served as the stimulus model (presenter). A camera, positioned behind the presenter, recorded the infant monkey. B. Experimental conditions: TP, tongue protrusion; LS, lip smacking; Disk, rotating disk. C. Design and timings for each experimental condition.
