A brain injury is the cruelest kind of injury in a crash case, because it can be invisible. There is no cast, no scar, sometimes not even a mark on a scan, and yet the person who walked away from the wreck is not the same person anymore. Crashes are a leading cause of traumatic brain injury, and even a so-called mild one can change a life.
A concussion is a brain injury
A concussion is a mild traumatic brain injury, and the word mild is misleading. It happens when the head is whipped or struck and the brain moves inside the skull, stretching and tearing microscopic nerve fibers in a process doctors call diffuse axonal injury. You do not have to lose consciousness to have one. The hallmarks are confusion and trouble with memory, and the early symptoms include headache, dizziness, nausea, and trouble concentrating, which can appear right away or come on gradually.
| Severity | What it looks like |
|---|---|
| Mild (concussion) | Brief or no loss of consciousness, confusion, headache, memory and concentration trouble |
| Moderate | Longer loss of consciousness, clearer cognitive and physical deficits, often visible on imaging |
| Severe | Extended unconsciousness, profound and often permanent impairment, life-altering care needs |
Brain injury cases are won on the medical and scientific evidence and on cross-examining the defense’s experts, which is the work I am known for. I came up taking apart the science the other side leans on, and a brain injury case is exactly that fight. Learn more about my background.
When symptoms do not go away: post-concussion syndrome
Many people recover from a concussion within a few weeks. A significant number do not. When the symptoms persist for months or years, doctors call it post-concussion syndrome, and it is a grinding constellation of headaches, dizziness, fatigue, irritability, trouble sleeping, and problems with memory and concentration. It wears down a person’s ability to hold a job, keep relationships steady, and feel like themselves. Roughly one in seven people with a mild brain injury go on to develop lasting problems like these.
Why a normal scan does not mean no injury
This is the single most important thing to understand about these cases. A standard CT scan is built to find bleeding and skull fractures, and an ordinary MRI is not much better at catching the microscopic fiber damage of a concussion. So the scan comes back clean while the person truly struggles. The injury is real; it is simply below the resolution of the picture. Insurers wave the clean scan like proof of nothing wrong, and answering that is where the case is built, with neuropsychological testing that measures the deficits, treating doctors who document them, and the people who can describe the change in the person.
How insurers attack a brain injury claim
The attacks are familiar: the scan was normal so nothing is wrong, the symptoms are subjective and started late so they cannot be trusted, the person is exaggerating for a payday, or the problems were there before the crash. Each one has an answer grounded in the medicine and the record. Knowing the defense will say these things, and building the proof to meet them before they are ever spoken to a jury, is how a brain injury case holds its value.
The symptoms of a brain injury
Concussion symptoms reach into every part of how a person functions, which is part of why they are so easy for an insurer to wave away one at a time. They tend to cluster into a few groups.
| Type | What it can look like |
|---|---|
| Physical | Headaches, dizziness, nausea, fatigue, and sensitivity to light and noise |
| Cognitive | Memory trouble, poor concentration, slowed thinking, and difficulty finding words |
| Emotional | Irritability, anxiety, depression, and personality changes |
| Sleep | Insomnia, sleeping too much, and disrupted sleep patterns |
Headache is the most common of all, reported by a large share of people after a brain injury, and the cognitive and emotional changes are often what family members notice first, even when the injured person insists they are fine.
The lasting cost of a brain injury
A brain injury does not stay on the medical chart; it follows a person into their job, their marriage, and their sense of who they are. Someone who once juggled a demanding job may find they can no longer keep up, lose income or a career, and need ongoing therapy or cognitive rehabilitation. When the deficits are permanent, a life-care plan may be needed to map the cost of future treatment and support. These are the losses that make a brain injury case serious, and they are exactly the losses an insurer will try to shrink by calling the injury mild.
Building the proof
Because the injury hides from an ordinary scan, it is proven through other means, layered together. Neuropsychological testing puts objective numbers to the deficits in memory, attention, and processing speed. Treating doctors document how the injury behaves over time. Advanced imaging can sometimes show what a routine scan cannot. And the people who knew the person before the crash describe the change in plain terms a jury understands. No single piece carries the case; the weight of all of them does.
What to do if you hit your head in a crash
Get evaluated promptly, even if you feel only dazed, because brain injury symptoms often surface or worsen over the following days and a clean check at the scene proves little. Tell the doctor every symptom, including the cognitive and emotional ones that feel embarrassing to mention, so they make it into the record. Rest as advised and avoid a second blow to the head while you are still recovering, since a second injury before the first has healed can be far more dangerous. And keep track of the changes you and your family notice, because that record becomes some of the most persuasive proof in the case.
Common Questions
Can I have a brain injury if my CT scan was normal?
Yes. Most concussions, which doctors call mild traumatic brain injuries, do not show up on a standard CT scan, and often not on a routine MRI either, because the damage is at the level of the brain's individual nerve fibers rather than something a scan resolves. A clean scan rules out bleeding, which is important, but it does not rule out a brain injury. Insurers know this and still point to the clean scan to deny the claim.
What is post-concussion syndrome?
It is the name for concussion symptoms that persist for months or even years after the injury. While many people recover within weeks, a meaningful share develop lasting problems with headaches, memory, concentration, mood, sleep, and sensitivity to light and noise. Post-concussion syndrome can quietly take apart someone's ability to work and function long after everyone expected them to be fine.
My symptoms did not start until a few days after the crash. Does that hurt my claim?
No. Brain injury symptoms commonly emerge or worsen over the hours and days after the trauma, as the injured tissue responds. That delay is well recognized in the medical literature. It does mean you should be seen by a doctor promptly, both for your health and to protect your benefits, so the record connects the symptoms to the crash.
How do you prove a brain injury the insurance company cannot see?
Through the people and the testing that can see it. Neuropsychological testing measures the cognitive deficits objectively, treating physicians document the course of the injury, and the people who knew the person before the crash can describe the change in them. The symptom timeline, tied to the crash, ties it all together. The injury is invisible on a scan, not invisible to proof.
Is a concussion a permanent injury under Florida law?
It can be. Where the cognitive or other deficits are permanent within a reasonable degree of medical probability, a brain injury meets Florida's threshold and opens the door to full damages against the at-fault driver. Post-concussion syndrome that does not resolve is a common way that happens, which is part of why documenting the lasting effects matters so much.
Related: Serious injuries, Whiplash and neck injuries, Herniated discs and spine injuries, and Car accidents.
This page is general information about Florida law, not legal advice, and it does not create an attorney-client relationship. Florida’s serious injury threshold for pursuing the at-fault driver appears in section 627.737 of the Florida Statutes, and the no-fault and Personal Injury Protection rules in section 627.736. Every case is different, and past results do not guarantee a similar outcome. The hiring of a lawyer is an important decision that should not be based solely on advertisements.
