Table 2.

Loci showing gray matter density reductions in combat-exposed twins with vs. without combat-related PTSD that were significant at uncorrected p<0.001

z	psvc	k	[x y z]	Brain Region
4.50	0.001	248	[44 −2 −14]	right mid insula
4.47		145	[−62 −56 −4]	left middle temporal gyrus
4.39	0.001	27	[34 −28 −16]	right hippocampus
3.95	0.005	236	[−36 10 −4]	left anterior insula
3.71	0.004	185	[0 46 10]	pregenual anterior cingulate cortex
3.52		35	[−46 42 −14]	left inferior frontal gyrus
3.47		22	[−64 −44 10]	left superior temporal gyrus

p_svc = significance level with small volume correction based upon the a priori size of the structure

k = cluster size

[x y z] = MNI coordinates of peak voxel

Predicted areas appear in boldface.