Table 2. Group differences in volumes.

Region	Younger group		Elderly group		p value
	Average	S.D.	Average	S.D.
left inferior frontal gyrus	1098.6	164.2	994.5	197.7	0.122
left insula gyrus	1602.0	194.0	1291.7	204.4	0.001
left orbital gyrus	5927.2	628.4	5001.0	655.0	0.001
left supramarginal gyrus	7061.7	1122.3	5704.2	835.5	0.002
left precuneus	6231.1	854.5	5386.9	905.3	0.044
left straight gyrus	2271.9	305.3	2159.8	253.9	0.835
left superior temporal gyrus	5927.9	735.6	5132.5	767.1	0.015
left hippocampus	4171.6	350.3	3439.8	348.6	< 0.0001
left amygdala	1773.5	171.0	1350.1	174.6	< 0.0001
right inferior frontal gyrus	1030.8	193.7	865.6	202.9	0.323
right insula gyrus	1634.7	253.4	1331.8	134.1	0.011
right orbital gyrus	6670.6	741.8	5891.4	609.7	0.063
right supramarginal gyrus	6241.0	1319.9	5032.1	572.3	0.106
right precuneus	5700.8	1000.3	4913.1	889.4	0.039
right straight gyrus	2072.0	261.6	1742.3	191.9	0.007
right superior temporal gyrus	5126.1	657.8	4369.4	724.7	0.005
right hippocampus	4389.3	324.1	3608.9	427.7	< 0.0001
right amygdala	1822.2	154.8	1521.4	189.7	< 0.0001