Until now, post-traumatic stress was labeled as a soft disorder because it did not have adequate means of diagnosis but now it has. PTSD is believed to have affected more than 300,000 veterans of Iraq and Afghanistan.

Researchers at the University of Minnesota and the Minneapolis VA Medical Center claimed to have established a different pattern of activity of brain among PTSD sufferers.

"This shows that PTSD is a brain disease. There have been questions that this is a made-up disorder and isn't a true brain disease, but it is,” says Dr Apostolos Georgopoulos, who led the research along with Brian Engdahl, and a team from the Brain Sciences Center at the Minneapolis VA Medical Center and University of Minnesota.

Evidence of PTSD was not being detected because of picture of brain activity in PTSD affected people was occurring too slowly. The conventional method of diagnosing PTSD using tools like computed tomography, magnetic resonance imaging and X-rays were not delivering desired results.

Magnetoencephalography (MEG) is being used to map the pattern of electrical activity going inside the head which is one using a helmet that has about 248 noninvasive sensors.