A traumatic brain injury is one of the most serious harms a person can suffer, and one of the hardest to prove. Unlike a broken bone that shows up plainly on an X-ray, a brain injury often leaves no obvious mark, and its effects, trouble concentrating, memory gaps, headaches, mood changes, exhaustion, can be invisible to everyone except the person living with them. That gap between how serious the injury is and how little it shows is exactly what an insurer will try to use.
If you or someone close to you suffered a brain injury in one of the many kinds of accidents we handle, the strength of the claim will depend less on the label a doctor puts on it and more on the evidence that connects the injury to the harm in your daily life. This article explains why a traumatic brain injury is difficult to prove, the kinds of evidence that actually carry weight, how Massachusetts law frames the claim, and the steps that protect it from the day of the injury forward.
Why a traumatic brain injury is hard to prove
Brain injuries occupy a strange place in injury law. They can be devastating and permanent, yet a person with one may look completely normal, speak clearly in a short conversation, and show nothing on a standard scan. Understanding why these injuries are so easy to doubt is the first step in proving one.
The injury you cannot see
Many traumatic brain injuries, especially the ones labeled mild, do not appear on a routine CT scan or MRI. The damage is often microscopic, a disruption in how brain cells communicate rather than a visible bleed or fracture. That does not make the injury minor. A person with a so-called mild brain injury can struggle to hold a job, follow a conversation, or get through a day without exhaustion. But because the harm does not photograph, an insurer can argue it is exaggerated, imagined, or unrelated to the accident, and a claim that relies on the injured person simply describing how they feel is vulnerable to that argument.
When symptoms are delayed or mistaken
Brain injury symptoms do not always arrive on the day of the accident. Headaches, sleep problems, irritability, and difficulty concentrating can build over days or weeks, and they are easy to attribute to stress, poor sleep, or the ordinary aftermath of a frightening event. People often push through, assuming they will recover, and only later realize how much has changed. That delay creates a gap in the record, and a gap in the record is something an insurer will point to, arguing that if the injury were real, it would have been documented immediately. The reality of how brain injuries present and the way claims are evaluated do not always line up.
The insurer’s favorite arguments
When a brain injury claim arrives, the defense tends to reach for a familiar set of arguments. The symptoms are subjective and cannot be measured. The scans are clean. The person has a pre-existing condition, a prior concussion, anxiety, a learning difference, that explains everything. The complaints are driven by the litigation rather than the accident. None of these arguments is unbeatable, but each one gains force when a claim is built only on the injured person’s own account. Answering them takes objective evidence and the right experts, which is where a serious brain injury case is won or lost.
Why “mild” is a misleading label
The word that causes the most confusion in brain injury cases is mild. In medicine, a mild traumatic brain injury describes how the injury presented at the moment it happened, a brief or no loss of consciousness, a short period of confusion, not how serious or lasting its effects will be. Many people with a mild traumatic brain injury recover fully, but a meaningful number do not, and they live with headaches, cognitive difficulty, and emotional changes for months or years. An insurer is content to let the word mild do its work, treating it as a synonym for minor. Part of proving a brain injury is making clear that the label describes the initial event, not the size of the harm, and that an injury called mild can produce anything but mild consequences in a person’s daily life.
The evidence that proves a brain injury
Because a brain injury rarely proves itself, the case has to be built deliberately, layer by layer, from sources that a skeptical adjuster or jury will credit. No single piece usually carries the day; it is the combination that makes the injury undeniable.
Medical imaging and its limits
Imaging still matters, even though standard scans often miss mild injuries. A CT scan can rule out a bleed that needs emergency care, and an MRI can reveal certain kinds of damage. More advanced imaging is sometimes used to show changes that ordinary scans cannot. But it is important to understand the limits: a normal scan does not mean there is no injury, and a good claim does not rise or fall on imaging alone. Used correctly, imaging is one supporting piece, not the whole case, and treating it as the whole case is a mistake that plays into the insurer’s hands.
Neuropsychological testing
One of the most powerful tools in a brain injury claim is neuropsychological testing. A trained specialist administers a battery of standardized tests that measure memory, attention, processing speed, language, and executive function, and compares the results against what would be expected for someone of the same age and background. These tests are designed to detect effort and consistency, which helps answer the argument that symptoms are exaggerated. When testing shows a pattern of deficits consistent with the injury, it converts subjective complaints into measured, documented findings, and that is exactly the kind of objective proof a brain injury case needs.
The people who knew you before
Some of the most persuasive evidence in a brain injury claim does not come from a doctor at all. It comes from the people who knew the injured person before the accident, a spouse, a parent, a close friend, a supervisor, who can describe in concrete terms what changed. The reliable employee who now misses deadlines. The patient parent who is suddenly short-tempered. The person who used to manage the household finances and now cannot keep track of bills. This before-and-after testimony gives a human, observable form to an injury that scans may not show, and it is often what makes the harm real to a jury.
The treating providers and specialists
A brain injury claim is strongest when it is supported by the providers who actually treated the injury and by specialists who can explain it. Emergency records, the treating physician’s notes, and referrals to neurology, rehabilitation, and cognitive therapy all build the timeline. Specialists, a neurologist, a neuropsychologist, a physiatrist, can connect the mechanism of the accident to the injury and explain why the symptoms are consistent with the trauma. This is also why following through on every recommended evaluation and treatment matters: gaps in care become gaps in proof.
Connecting the injury to the accident
Proving that a brain injury exists is only half the work; the claim also has to tie it to the accident rather than to some other cause. This is where the mechanism of the injury matters, how the head moved, what it struck, the forces involved, and where specialists explain why those forces are consistent with the symptoms that followed. The medical timeline does important work here, because an injury documented soon after the accident, with symptoms that track the expected course, is far harder to attribute to something unrelated. Causation is often the real fight in a brain injury case, and it is won with evidence that links the event, the injury, and the ongoing harm into a single coherent picture rather than a series of disconnected complaints.
The insurer’s independent medical examination
At some point in a contested brain injury claim, the insurer will usually arrange an independent medical examination, a review by a doctor it selects. Despite the name, this examination is requested and paid for by the defense, and its findings frequently favor that side, often concluding that the injured person has recovered or that the symptoms are unrelated to the accident. Knowing this in advance changes how an injured person should approach it: be honest and consistent, neither exaggerate nor minimize, and understand that the resulting report is one opinion to be answered, not the final word. A well-supported claim, built on treating records and objective testing, is what allows that opinion to be put in context rather than allowed to control the outcome.
How Massachusetts law frames a brain injury claim
Proving the injury medically is only part of the work. The claim also has to fit the legal framework that governs personal injury cases in Massachusetts, and a few rules deserve particular attention in a brain injury case.
The serious-injury threshold in motor vehicle cases
When a brain injury arises from a car or truck crash, Massachusetts law adds a step. Under the no-fault system, MGL c. 231, § 6D requires that an injured person meet a statutory threshold before recovering for pain and suffering against the at-fault driver. That threshold is met either when the reasonable cost of treating the injury passes a set amount or when the injury falls into one of several defined categories of serious harm, such as a fracture or permanent disfigurement. A genuine traumatic brain injury, which typically demands extensive evaluation and ongoing treatment, generally meets it, but proving that it does, with the medical evidence described above, is part of getting past the gate. In cases that do not involve a motor vehicle, this particular threshold does not apply, but the need to prove the injury seriously does not change.
The filing deadline
A personal injury action in Massachusetts generally must be brought within three years of the injury under MGL c. 260, § 2A. Brain injuries can complicate the timing, because the full extent of the harm sometimes becomes clear only over months of evaluation and treatment, and because a person whose cognition is affected may not act as quickly as the law expects. There are limited circumstances that can affect when the clock runs, but they are fact-specific and not safe to assume. Confirming the correct filing deadline early is one of the simplest ways to keep a brain injury claim alive.
Comparative fault
Massachusetts follows a modified comparative negligence rule under MGL c. 231, § 85. Your own share of fault reduces your recovery, and if you are found more than half at fault, it bars recovery entirely. In a brain injury case the defense often tries to shift fault onto the injured person, both to reduce what it owes and to distract from the severity of the harm. Understanding how comparative negligence works, and answering fault arguments with evidence rather than concessions, protects both the existence and the value of the claim.
Pre-existing conditions and the eggshell plaintiff
Insurers lean heavily on pre-existing conditions in brain injury cases, pointing to an old concussion, a learning difference, anxiety, or depression as the true source of the symptoms. Massachusetts law, like negligence law generally, recognizes that a wrongdoer takes the injured person as they find them: if an accident aggravates or worsens a pre-existing condition, the responsible party can be liable for that worsening, even where a healthier person might have walked away unharmed. The practical task is to separate the prior baseline from the new harm, which is one more reason the before-and-after evidence and the treating records carry so much weight. A pre-existing condition complicates a brain injury claim, and an insurer will press on it hard, but it does not automatically defeat the claim.
Protecting a brain injury claim from the start
The decisions made in the first days and weeks after a head injury often matter more than anything that happens later, because they shape the medical record the entire claim will rest on. None of this requires acting like a litigant; it requires taking the injury seriously and documenting it.
Get evaluated and keep treating
The single most important step is to be evaluated promptly and to follow through with every recommended appointment, test, and therapy. A prompt evaluation creates the early record that ties the injury to the accident, and consistent treatment both helps recovery and builds the documented timeline a claim depends on. When symptoms appear later, as they often do, they should be reported and recorded rather than ignored, because what is written down is what can later be proven, and an injury that helps determine what the claim is ultimately worth has to be visible in the record.
Document the before and after
Because change is the heart of a brain injury claim, it helps to capture it. Keeping a simple symptom journal, noting headaches, memory lapses, mood changes, and the tasks that have become difficult, creates a contemporaneous record that is hard to dismiss. Saving work performance records, school records, or anything that shows functioning before and after the injury gives the before-and-after comparison concrete support. The people close to the injured person should be paying attention too, because their observations may become some of the most important evidence in the case.
Be careful with the insurer
A person with a brain injury is in a poor position to spar with an insurance adjuster, and adjusters know it. Early recorded statements, quick settlement offers, and requests for broad access to medical history are all routine, and all can be used to undercut a claim, especially by surfacing a pre-existing condition to blame for the symptoms. It is wise to be cautious about these contacts and to get advice before agreeing to anything, because a brain injury claim is too important, and too easy to damage early, to navigate alone.
Account for long-term and future harm
Brain injuries are often not fully understood for months, and some effects prove permanent. A claim resolved too quickly, before the long-term picture is clear, can leave real future harm uncompensated, and once a claim is settled it cannot be reopened because the injury turned out to be worse than it first appeared. Documenting the trajectory of the injury over time, the treatment still needed, the work that can no longer be done, the support a person now relies on, is part of valuing the claim honestly, including the pain and suffering a brain injury causes.
If you or a loved one suffered a traumatic brain injury in a Massachusetts accident, the Massachusetts brain injury attorneys at Larson Law help injured people and their families document these injuries properly, bring in the right specialists, and answer the arguments insurers use to minimize them. You can reach our team here or call 508-888-8888 to talk through what happened, at no cost. A brain injury deserves to be taken seriously, and the sooner the right evidence is gathered, the harder it is for anyone to pretend the injury is not real, or to treat it as anything less than what it is.
FAQs
Can you have a traumatic brain injury if your scan looks normal?
Yes. Many traumatic brain injuries, particularly those labeled mild, do not appear on a standard CT scan or MRI because the damage is microscopic. A normal scan does not rule out a brain injury. Neuropsychological testing, treating-provider records, and observations from people who knew you before the accident are often what prove the injury when imaging cannot.
What evidence is most persuasive in a Massachusetts brain injury claim?
There is rarely a single decisive piece. The strongest claims combine medical records and imaging, neuropsychological testing that measures cognitive deficits objectively, opinions from treating specialists, and before-and-after testimony from family, friends, and coworkers. Together these convert symptoms that an insurer would call subjective into documented, measurable harm.
How long do I have to file a brain injury claim in Massachusetts?
Generally three years from the date of injury under MGL c. 260, § 2A, though the timing can be more complicated when the full extent of a brain injury becomes clear only over time. Because the deadline is firm and the exceptions are narrow and fact-specific, it is wise to confirm your specific deadline with an attorney early.
Will a pre-existing condition ruin my brain injury claim?
Not necessarily. Insurers often point to a prior concussion, anxiety, or another condition to explain the symptoms, but Massachusetts law generally allows recovery for the worsening of a condition caused by the accident. The key is medical evidence that distinguishes your prior baseline from the harm the accident caused, which is exactly what the right specialists can provide.
Do I need an attorney to prove a traumatic brain injury?
Brain injury claims are among the most contested, expert-driven cases in personal injury law, and they are difficult to build and prove without help. An attorney can identify the specialists needed, preserve the evidence, answer the insurer’s arguments, and present the injury in a way that reflects its true severity. Most people are not positioned to do that on their own while also recovering.
Results Disclaimer: Past case results, settlements, and verdicts mentioned on this website do not guarantee or predict a similar outcome in any future case. Every case is unique and depends on its own facts and legal issues.