Study Overview

Section 721 of the 2007 National Defense Authorization Act required a 15-year longitudinal study on the effects of traumatic brain injury incurred by members of the armed forces serving in Operation Iraqi Freedom or Operation Enduring Freedom. The 15-Year Longitudinal TBI Studies included the:

• Natural History of TBI study
• Caregiver and Family Member study
• Archival studies

The research program also included the Improved Understanding of Medical and Psychological Needs in Veterans and Service Members with Chronic TBI study — or IMAP study.

The following questions describe what the research program set out to answer. Download the 15-Year Studies and IMAP Conclusion Summary fact sheet to see what was discovered.

• What are the long-term physical and mental health effects of TBI?
• What are the health care, mental health care, and rehabilitation needs?
• What is the availability of long-term care and rehabilitation programs within and outside the DOD and VA?
• What is the effect on family members and caregivers?

This research began in 2010 and a final report to Congress is now available. Progress reports at the three-, seven-, and 11-year marks are also available to view or download. 

• NDAA FY07 Section 721 Final Report to Congress
• NDAA FY07 Section 721 Third Interim Report (Year 11)
• NDAA FY07 Section 721 Second Interim Report (Year 7)
• NDAA FY07 Section 721 First Interim Report (Year 3)

Learn more about the research from the following resources.