Age-related changes in slow and alpha coherence. (A) A multiple linear regression model was used to describe the relationship between frontal slow (0.1 to 1 Hz) coherence and age (blue). Slow coherence appeared to increase linearly between 1 and 21 yr of age. (B) A multiple linear regression model was used to describe the relationship between frontal alpha (8 to 13 Hz) coherence and age (red). Alpha coherence peaked at 8.9 yr of age (95% CI, 7.4 to 12.2 yr). The shaded bounds represent the 95% CI for these regression models. (C) Alpha oscillation power was greater than slow power from 2.6 to 14 yr of age (95% CI, bootstrap analysis). The horizontal green line represents the ages for which there is a statistically significant difference between slow and alpha coherence.