Table 4.

Percent increases in brain metabolism (averaged values in left and right regions) with the cognitive task, significance level for the comparison with the baseline metabolic measures (paired t-tests) and correlations between the changes in metabolism with the task and the baseline metabolic measures

Brain region	% Increase in metabolism with task	Paired t-test Baseline vs. task	Correlations with baseline metabolism
Frontal	19 ± 26	T = 3.2 P < 0.005	R = 0.64 P < 0.002
Parietal	21 ± 26	T = 3.7 P < 0.002	R = 0.54 P < 0.01
Temporal	16 ± 25	T = 2.5 P < 0.05	R = 0.53 P < 0.01
Occipital	22 ± 26	T = 3.7 P < 0.002	R = 0.53 P < P 0.05
Caudate	16 ± 28	T = 2.3 P < 0.05	R = 0.43 P < 0.06
Putamen	16 ± 27	T = 2.4 P < 0.05	R = 0.67 P < 0.001
Thalamus	26 ± 35	T = 3.3 P < 0.004	R = 0.63 P < 0.003
Hippocampus	21 ± 27	T = 2.2 P < 0.05	R = 0.73 P < 0.0002
Cerebellum	21 ± 30	T = 2.9 P < 0.008	R = 0.67 P < 0.001

The values for the percent increases correspond to mean and standard deviations.