Traumatic brain injury and post traumatic stress disorder both characterized by severe physiological and irreparable damage to the brain are subject of a new study released by the RAND Corporation.

“There is a major health crisis facing those men and women who have served our nation in Iraq and Afghanistan,” said Terri Tanielian, the project’s co-leader and a researcher at the nonprofit RAND.

“Unless they receive appropriate and effective care for these mental health conditions, there will be long-term consequences for them and for the nation,” she said in an interview with The Associated Press.

The 500-page study is the first large-scale, private assessment of its kind — including a survey of 1,965 service members across the country, from all branches of the armed forces and including those still in the military as well veterans who have left the services.

Its results appear consistent with a number of mental health reports from within the government, though the Defense Department has not released the number of people it has diagnosed or who are being treated for mental problems. The Department of Veterans Affairs said this month that its records show about 120,000 who served in the two wars and are no longer in the military have been diagnosed with mental health problems. Of the 120,000, approximately 60,000 are suffering from PTSD, the VA said.

The report entitled “Invisible Wounds of War: Psychological and Cognitive Injuries, Their Consequences, and Services to Assist Recovery.” indicates that only 53% of service members seek treatment. It is so important that we encourage our returning veterans to seek help before they join the ranks of homeless veterans now comprising 25% of our homeless population.