A simple explanation of how PTSD affects the brain.
Dr. Kirby Reutter is a good resource for trauma and PTSD research.

A simple overview of trauma from Dr. Bessel van der Kolk. Dr van der Kolk is a trauma expert and author of ‘The Body Keeps the Score.’
Compassion Prison Project helps prisoners (and all of us) to understand how trauma affects their lives and decision-making.

NICABM How Trauma Impacts our Memory – click the graphic for link to downloadable file