Table 3.

Measured parameters of the hemodynamic response function in the 3 subject groups. (*p < 0.05, **p < 0.001 Mann–Whitney–Wilcoxon test in comparison to adult group, Holm–Bonferroni correction for multiple comparisons).

Group	n	Time to positive peak (median, range; seconds)	Positive peak amplitude (median, range; % BOLD signal change)	Undershoot to positive peak ratio (median, range)
Preterm infant	10	11.25 (8.5–16)**	0.52 (0.19–0.99)**	0.15 (0–0.62)
Term equivalent infant	15	7.0 (3–9)*	0.54 (0.27–1.42)**	0.49 (0–3.31)*
Adult	10	5.38 (4.5–9)	1.63 (0.78–2.93)	0.23 (0–0.69)