Fig. 1

a Representation of the sequence of events in the tactile repetition suppression paradigm. Pairs of 200-ms-long vibrotactile stimuli were delivered to the infants’ feet with a 700-ms ISI within the pair and 8–12 s ISI between the pairs. Pre-stimulus and post-stimulus phases (4 s each) are highlighted in yellow. b High-density EEG was recorded while vibrotactile stimuli were delivered to the infants’ feet through custom-made tactors (the light blue circle indicates the location of one tactor). c Hydrocel-Geodesic Sensor Net montage displaying the central somatosensory pool of electrodes (black circle) used for quantifying α desynchronization (6–10 Hz) to vibrotactile stimulation. The pool corresponded spatially to the somatotopic representation of the human feet.