For decades, mild traumatic brain injury has been called an invisible wound — not because the suffering isn't real, but because the existing evaluation models have never been able to identify its full root cause. Without a complete picture of what is actually driving the symptoms, veterans and athletes have been left with one option: manage what they feel, because medicine could not explain where it was coming from. More recently, progress has been made in understanding what blast and impact do to the brain, but a significant portion of the symptoms these patients carry do not match the brain findings alone. The headaches that outlast every treatment, the fog, the sleeplessness, the emotional dysregulation, the dizziness — these are real symptoms, thoroughly documented and consistently unresolved. They point to an origin that the prevailing model of mTBI has never fully evaluated — the craniocervical junction.

The craniocervical junction (CCJ), where the skull meets the upper cervical spine, is the neurological, vascular, and fluid-dynamic crossroads between the body and the brain. When it is disrupted by blast overpressure, by repetitive head impact, or by the cumulative mechanical forces of a career in special operations or professional football, the consequences reach every system it governs and produce symptoms that have historically been attributed to the brain alone. This study is not about replacing what we know. It is about revealing what we have been missing. For the first time, we are mapping the full picture of the injury, brain and structure together, with the scientific rigor required to change how medicine, the military, and the VA understand and treat mild traumatic brain injury for good. The invisible wounds are more visible than most people realize, and this study is designed to prove it.