Post-Traumatic Stress Disorder (PTSD) is a complex psychiatric condition, the effects of which can be seriously debilitating.However, even extremely sensitive tests (> 95%) can have insufficient accuracy if the prevalence of a condition in the tested population is low.Neuroscience is slowly discovering the neural bases of PTSD and other psychiatric ailments and is building tests to distinguish actual patients from non-suffering individuals.We examine the current state of neuroscientific research on PTSD and its biomarkers, focusing on a recent experiment by Apostolos Georgopoulos and coworkers.It is currently one of the most frequently litigated mental diseases.