Few injuries leave less behind on paper than a concussion. A broken wrist shows up on an X ray, and a torn ligament lights up on an MRI. A brain that was shaken hard enough to change how someone thinks, sleeps and handles noise can still produce a CT scan the radiologist calls unremarkable. Insurance adjusters know this, and many build their first offer around that single word.

That gap between what a scan shows and what a person lives with is where many head injury claims are won or lost. Dax Jones, a Bellevue lawyer with more than 24 years of trial work behind him, handles brain injury and concussion cases along with the crashes that cause them, and one of his published results involved a Renton collision where brain bleeds surfaced only after the impact. His clients pay nothing up front, and he connects people to a local network of doctors when getting proper treatment is the first hurdle.

So how does an injury that hides from standard imaging get proven? Usually not through one dramatic test, but through layers of evidence that stack on top of each other, starting with the smallest details and building toward expert opinion.

Why “Mild” Is a Misleading Word

Doctors classify most concussions as mild traumatic brain injuries. The label refers to the initial clinical picture, often measured with the Glasgow Coma Scale, not to how the injury affects someone months later. A person can score near perfect in the emergency room, walk out the same night and still struggle with headaches, light sensitivity, slowed thinking and irritability long afterward.

Standard CT scans are designed to catch bleeding, swelling and skull fractures that may need surgery. They are not built to detect the microscopic stretching of nerve fibers that happens when the brain accelerates and decelerates inside the skull. A normal CT therefore answers one narrow question, whether emergency intervention is needed. It says very little about whether the brain was injured.

The Smallest Layer Is What the Person Noticed

Proof often begins with details that seem too minor to matter. A moment of confusion after the crash, asking the same question twice, not remembering the drive to the hospital, a ringing in the ears, or feeling “foggy” at the scene all carry weight when they appear in early records.

Paramedic run sheets and emergency room notes capture some of these, but only if the injured person mentions them. People tend to report the neck pain or the bleeding knee and skip the strange disorientation because it already seems to be fading. Those omissions are exactly what an insurer later points to.

Family, Coworkers and the Before and After

Brain injuries often show up most clearly to other people. A spouse notices shorter patience at dinner. A manager sees deadlines slipping from someone who never missed them. A friend notices the person now leaves loud restaurants early.

These observations become what lawyers call before and after evidence. It tends to be persuasive because it comes from people who knew the injured person well before the crash. The most useful sources tend to be these.

• Written statements or testimony from a spouse, partner, close friend or adult child
• Performance reviews, emails and work product from before and after the injury
• School records or grades for younger clients
• A simple symptom journal kept by the injured person in the weeks after the crash

The journal sounds small, but dated entries describing headaches, sleep problems and memory lapses carry far more credibility than a recollection pieced together a year later.

Blood Tests Have Changed the Early Picture

One of the more meaningful medical developments in recent years is the brain injury blood test. Abbott’s i-STAT TBI test measures two proteins, GFAP and UCH-L1, that are released into the bloodstream after brain trauma. The FDA cleared a whole blood version in 2024, which allows results in about 15 minutes at the bedside and can be used up to 24 hours after an injury.

The test was designed mainly to help doctors decide who needs a CT scan, not to diagnose concussion outright. Even so, an elevated result recorded in an emergency department creates an objective marker of brain injury tied to a specific date, which is something concussion claims have historically lacked. As more urgent care clinics and hospitals adopt it, these results are starting to appear in medical records that later reach insurers.

Specialists Who Measure What Imaging Misses

When symptoms persist beyond a few weeks, the evidence shifts from emergency records to specialists. This is where the strongest proof usually comes from.

Neuropsychological testing

A neuropsychologist runs several hours of standardized tests covering memory, attention, processing speed and executive function, then compares the results against norms for the person’s age and education. Good testing also includes validity measures that check whether the person is giving full effort, which takes away one of the defense’s favorite arguments.

Advanced imaging

Diffusion tensor imaging and other advanced MRI techniques can sometimes show damage to white matter that standard scans miss. These tools remain debated in courtrooms, and their findings are stronger when they line up with testing and symptoms than when they stand alone.

Vestibular, vision and sleep specialists

Dizziness, balance problems, trouble reading and disrupted sleep often have their own specialists. Each one adds a separate, measurable finding to the record.

How Insurers Push Back

Insurers rarely deny that a crash happened. They argue about what it caused. Common responses include pointing to low property damage on the vehicles, highlighting gaps in treatment, blaming prior headaches or anxiety, and relying on claims software that scores injuries largely from diagnosis codes and visible findings. A concussion with a normal CT often scores poorly under these systems, which explains why first offers can feel disconnected from what the person is actually experiencing.

Prior conditions do not end a claim. Washington law allows recovery when a crash worsens an existing condition, and juries hear instructions on that point. Washington also places no cap on damages for pain, suffering and loss of enjoyment of life in ordinary injury cases, after the state Supreme Court struck down an earlier cap in 1989.

Living With the Injury While the Claim Moves

The medical side and the legal side tend to move at different speeds. Doctors often want to see where symptoms settle before giving long term opinions, which means resolving a brain injury claim too early can leave future care, lost earning capacity and ongoing therapy out of the picture.

For people and families trying to understand recovery itself, the University of Washington Traumatic Brain Injury Model System collects research based resources on living with brain injury, from return to work to managing fatigue.

A normal scan, in the end, is one piece of information and not a verdict. When symptom notes, witness accounts, blood markers and specialist testing all point in the same direction, the injury becomes visible in a way no single image could make it.