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Peristimulus timeseries plots for the (a) adult; (b) term equivalent infant; (c) preterm infant groups. Stimulation occurred at time point 0, lasting a total of 1 s. The mean % BOLD signal change (relative to the pre-stimulus signal) at each timepoint (circles) is shown fitted with a double gamma probability distribution function. Error bars represent 2 SEM. (d) A decrease in the time to peak of the HRF, and an increase in peak amplitude is seen with increasing age.
