Neural activity and emotional processing following military deployment: Effects of mild traumatic brain injury and posttraumatic stress disorder.

•PTSD and mTBI groups show distinct neural patterns in emotional face processing.•Soldiers from OEF/OIF provided EEG responses prior to, and following deployment.•PTSD symptoms associated with increased P1 and P2 amplitudes to threatening faces.•mTBI group show reduced N170 amplitude to all facial expressions.