Alpha-Theta training is a powerful alternative treatment for PTSD. Individuals with Post Traumatic Stress Disorder suffer from severely overactive defensive systems.
This over activation of the fight-or-flight mechanism is marked by high-beta activity and high levels of stress hormones that interfere with sleep and dysregulate the brain.
Alpha-Theta training calms down the nervous system, reduces Cortisol levels, and improves sleep by slowing down high-beta activity. Nightly Delta wave training is also beneficial entering into deeper healing and regenerative sleep states, known as Slow Wave Sleep, SWS.
I own a brainmaster atlantis machine, probally costs a few thousand dollars. You can also go to a practioner http://directory.eeginfo.com/