Brain Injuries

How Do You Prove a Brain Injury After a Car Accident?

The Herman Firm Legal Team  |  9 min read  |  Personal Injury

A brain injury after a car accident is proven through a combination of medical documentation, objective testing, and evidence of how your life changed. That usually means prompt emergency or physician records, imaging such as a CT or MRI where indicated, evaluation by a neurologist or neuropsychologist, consistent treatment records, and testimony from people who saw changes in you. Because mild brain injuries often look normal on standard scans, the quality of the surrounding documentation matters a great deal.

Insurance companies tend to scrutinize brain injury claims closely, particularly when there was no loss of consciousness or no visible damage on imaging. Building the record early is the best protection.

Start With Prompt Medical Care

The first medical records after the accident carry weight. They document your symptoms close in time to the crash, which helps connect the injury to the accident and answers arguments that your symptoms came from something else. Tell every provider about every symptom, including headaches, dizziness, memory lapses, or changes in mood, even if they seem minor.

Types of Evidence That Help Prove a Brain Injury

Why Normal Scans Do Not End the Discussion

Standard CT and MRI scans are designed to find bleeding, swelling, and structural damage. Mild traumatic brain injuries, including concussions, frequently do not show up on them even though symptoms are real. Some clinicians use more advanced imaging or functional testing in certain cases, though its role is debated, which is why neuropsychological testing and clinical evaluation are often central to proving these injuries.

Neuropsychological Testing

A neuropsychologist administers standardized tests that measure thinking, memory, attention, and problem solving, then compares results with expected norms. This can provide objective evidence of cognitive deficits when imaging is normal. Testing often has the most value when it is done by a qualified specialist and when results are consistent with the symptoms recorded elsewhere.

The People Around You Are Evidence Too

Family, friends, and coworkers often notice changes before you do, such as forgetfulness, irritability, withdrawal, or trouble keeping up at work. Their observations, and your own dated journal of symptoms, help show how the injury affects daily life in ways test results alone may not capture.

Common Insurance Arguments and How They Are Met

1. “There was no loss of consciousness.”

   Most concussions occur without it. See our article on whether you can have a brain injury without losing consciousness.

2. “The scans were normal.”

   Mild injuries often do not appear on standard imaging, and clinical and neuropsychological evidence can establish them.

3. “You waited to get treatment.”

   Consistent, prompt treatment records are the best answer, which is why early care matters.

4. “This was pre-existing.”

   Records of your functioning before the accident, compared with after, can show a clear change.

If you are dealing with a serious injury, an attorney who handles brain injury cases in Walnut Creek can coordinate with medical providers and experts to build the strongest possible record. For broader guidance, see what evidence you should keep after an injury.

Frequently Asked Questions