. Author manuscript; available in PMC: 2009 Jun 8.

Published in final edited form as: Nat Neurosci. 2007 Dec 23;11(2):232–237. doi: 10.1038/nn2032

Table 3.

Mean PTSD symptom frequency

Group	Re-experience	Avoidance/Numbing	Hyperarousal
Amygdala	0.43	0.28	0.36
vmPFC	0.76	0.55	0.69
Non-vmPFC/Non-amygdala	0.95	0.67	0.85
No brain damage	1.02	0.84	0.95

17 individual PTSD symptoms belonging to one of three symptom categories (re-experience, avoidance/numbing, and hyperarousal) were rated for frequency (0=never; 1=once or twice; 2=once or twice a week; 3=several times a week; 4=daily or almost every day). A 3 × 4 ("symptom type" × "lesion group") ANOVA revealed a significant main effect of "lesion group" but no interaction effects.