Table 2.

Between-group cluster list of task effects for PTSD symptom group > TC and TC > PTSD symptom group

Stress vs. Baseline
PTSD symptom group vs. TC								TC vs. PTSD symptom group
	Region	X	Y	Z	Z-score	Cluster size	p	Region	X	Y	Z	Z-score	Cluster size	p
R Hippocampus	R Cerebellum	16	−58	−16	4.11	28	< .001	L Middle Frontal Gyrus	−54	18	44	3.99	20	.002
L Hippocampus								L Inferior Frontal Gyrus (pars opercularis)	−58	16	34	3.85	31	< .001
								R Middle Frontal Gyrus	54	28	38	3.73	18	.004
R Amygdala
L Amygdala
mPFC								L Inferior Frontal Gyrus (pars opercularis)	−58	16	34	3.92	42	< .001
Recovery vs. Baseline
PTSD symptom group vs. TC								TC vs. PTSD symptom group
	Region	X	Y	Z	Z-score	Cluster size	p	Region	X	Y	Z	Z-score	Cluster size	p
R Hippocampus								L Inferior Frontal Gyrus (pars opercularis)	−58	16	34	3.80	22	.001
L Hippocampus								L Inferior Frontal Gyrus (pars opercularis)	−58	16	34	3.85	37	< .001
								R Middle Frontal Gyrus	54	28	38	3.68	24	< .001
R Amygdala
L Amygdala
mPFC								L Inferior Frontal Gyrus (pars opercularis)	−58	16	34	3.75	28	< .001

Significant results after correcting for multiple testing by FDR correction (α = 0.01) according to Benjamini and Hochberg (1995). Regions were identified using the Harvard-Oxford Cortical and Subcortical Structural Atlases or if probability of the labels was low (<15%) using the MNI Structural Atlas. PTSD symptom group n = 17, TC n = 22.