mTBI	Mild traumatic brain injury
PTSD	Post-traumatic stress disorder
aIC	Anterior insular cortex
MVC	Motor vehicle collision
SEAT	Shifted-attention Emotion Appraisal Task
PCL	PTSD Checklist-Stressor Specific Version
DSM-IV-TR	Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision
PTSSs	Post-traumatic stress symptoms
fMRI	Functional magnetic resonance imaging
ACRM	American Congress of Rehabilitation Medicine
T1	2 weeks post-trauma
T2	3 months post-trauma
GLM	General linear model
FLAME-1	FMRIB’s Local Analysis of Mixed Effects
FSL	FMRIB Software Library
RM-GLM	Repeated-measures general linear model
ANOVA	Analysis of variance
ROI	Region of interest
FWE	Family-wise error rate
COPE	Contrast of parameter estimates
OFG	Orbitofrontal gyrus
PFC	Prefrontal cortex