Fig. 1.

Neonates were tested using a 128-electrode EEG net in their isolettes a if they were in the NICU (preterm) or in their bassinettes in the newborn nursery (full-term). Calibrated tactile stimulation was delivered via a custom 3D-printed holder fastened with a neoprene glove to the infant’s hand allowing the air pulse to always have the same pressure and target (b). The paradigm presents stimuli in random order and at random intertrial intervals, with a standard /ga/ sound and the tactile air puff stimulation presented separately for unisensory conditions or simultaneously for multisensory conditions (see c). Finally, in the analysis, the unisensory responses are algebraically added to produce a summed response and compared with the true multisensory response (panel c, lower)