Yes
PTSD has specific chronological requirements and symptom markers that must be satisfied in order to diagnose
After - as in POSTtraumatic stress disorder
PDS is not a brain disorder, but an acronym for a test to screen for Posttramatic Stress Disorder, which is considered an anxiety disorder (so yes, it is a brain disorder) PDS stands for "Posttraumatic Stress Diagnostic Scale." At least, if you're referring to the same acronym I think you are.
Yes
Yes
Yes
Yes
Yes
Yes
PTSD/Posttraumatic stress disorder
PTSD/Posttraumatic stress disorder
Insomnia is the lack of the ability to sleep and can cause many problems for sufferers including disorganisation and delerium in the day time. Grumpiness is also another issue as is incoherence in extreme cases. One fact about insomnia is that it is not actually a sleep disorder in itself, it is more commonly a symptom of an underlying cause such as stress, poor diet or changes in social and environmental situations.