Table 1.
Mean of age and IQ in each group.
Figure 1.
The probe positions and the measurement areas.
a:The correspondence of the probe positions and the measurement areas on the cerebral cortex. b: The locations of NIRO probe were probabilistically estimated and anatomically labeled in the standard brain space (Brodmann's Area) according to [39].
Figure 2.
Grand average waveforms of ΔHb during the letter fluency task.
Upper: male, lower: female, right: adult group, left: child/adolescent group. Line: red, oxyhemoglobin; blue, deoxyhemoglobin. The period of the activation task is between the two dotted lines.
Figure 3.
The mean ΔHb of the hemispheres in each group.
Left: Δoxy-Hb, right: Δdeoxy-Hb, blue: male, red: female. The average Δoxy-Hb in the adult group was significantly larger than that in the child/adolescent group for male (F(1,30) = 11.55, p<.01). Moreover, for the adult group the average Δoxy-Hb in male was significantly larger than that in female (F(1,19) = 16.15, p<.01).
Figure 4.
The scatter plots of age and the mean ΔHb of the hemispheres.
Left: Δoxy-Hb, right: Δdeoxy-Hb, blue: male, red: female. Contrary to the strongly positive correlation between Δoxy-Hb and age in the child/adolescent group (male: r = 0.50, p = .017; female: r = .67, p<.001), the correlation coefficient was slightly negative but not statistically significant in the adult group.