Blog
Attorneys
Normal CT, Ongoing Symptoms: What Personal Injury Attorneys Should Understand About Concussion Evaluation
A clean CT scan tells you what did not happen, not what your client is experiencing. This guide explains why concussion rarely shows on standard imaging, what oculomotor and neuropsychological testing can document instead, and how validity-tested data answers the defense arguments built around a normal scan.
Board-certified physicians
Objective, FDA-approved testing
Multidisciplinary concussion rehab
You have likely heard some version of this before. A client comes in after a car accident or a workplace fall. The ER ran a CT scan. It came back normal. Weeks later, the client is still struggling with headaches, brain fog, irritability, or trouble concentrating at work.
For many attorneys, this creates an uncomfortable gap. The imaging says one thing. The client's daily experience says another. It is tempting to assume that a clean scan means there is nothing to document, but that assumption does not match how concussion actually works.
This pattern shows up often in personal injury cases involving head trauma. There is a clinical reason for it, and understanding that reason can change how a case gets built from the start.
Why a Normal CT Does Not Mean There Is No Brain Injury
What a CT Scan Is Actually Designed to Detect
A CT scan is built to catch specific, visible problems: bleeding in or around the brain, skull fractures, and large structural damage that needs immediate surgical attention. It is an excellent tool for ruling out emergencies. What it is not designed to detect is the kind of injury most concussions actually involve.
Why Concussion and Mild TBI Often Do Not Show Up on CT or Even MRI
A concussion is fundamentally a functional injury, not a structural one. It involves microscopic disruptions to how brain cells communicate, changes in blood flow, and shifts in metabolic activity. None of that shows up as a visible lesion on standard imaging.
Even MRI, which offers more detail than CT, frequently comes back normal after a concussion. A normal MRI after a brain injury is common, not unusual. Standard scans simply are not calibrated to capture the type of damage concussion typically causes.
Advanced imaging techniques like diffusion tensor imaging (DTI) can sometimes detect subtler changes in white matter connectivity, but these tools are not part of a standard emergency room workup, and even DTI does not capture every case. The absence of visible damage on any scan, standard or advanced, still does not rule out a real and disruptive injury.
Myth vs. Fact
Myth: A normal CT or MRI means the brain was not injured.
Fact: Normal imaging after a head injury is expected in most concussion cases. Imaging rules out catastrophic damage. It does not rule out concussion. The same principle applies in the neck, as we explain in cervical spine injury with a negative MRI.
The Gap Between Imaging and Functional Impairment
How Concussion Affects Brain Function Without Visible Structural Damage
Think of it less like a broken bone and more like a network problem. The hardware looks intact on a scan, but the signals traveling through it are not firing the way they should. That mismatch is exactly what makes concussion cases hard for clients to explain and hard for adjusters to take seriously without the right documentation. Our practical evaluation workflow for when imaging is negative maps out how clinicians approach this.
Common Symptoms That Persist Despite Normal Imaging
Clients with normal scans frequently report:
- Cognitive fatigue that worsens with mental effort
- Difficulty concentrating or holding a train of thought
- Oculomotor and vestibular issues, including dizziness or trouble tracking movement
- Executive function changes, like trouble planning or multitasking
- Headaches, light sensitivity, and sleep disruption
What Objective Testing Can Show When Imaging Cannot
Oculomotor and Oculo-Vestibular Assessment
These assessments measure how well the eyes track, focus, and coordinate with balance systems. Concussion frequently disrupts this coordination in measurable, reproducible ways, producing oculomotor dysfunction even when nothing appears on a CT or MRI.
Clients often describe symptoms like dizziness when reading, trouble following moving objects, or a sense of visual overwhelm in busy environments. These complaints can sound vague in a demand letter. An oculomotor assessment turns them into quantified findings, which carries very different weight in negotiation or litigation.
Neuropsychological Evaluation and What It Measures
A neuropsychological evaluation assesses memory, processing speed, attention, and executive function through standardized testing. It builds a functional profile of exactly where a client's cognitive performance has changed, with numbers and normed comparisons behind it rather than self-report alone.
Results are typically compared against population norms for the client's age and background, which gives the evaluation an objective anchor point. Instead of a client simply describing that their memory feels worse, the testing shows where their performance falls relative to expected function, and by how much.
Performance and Symptom Validity Testing: Why This Matters for Case Credibility
Performance validity testing (PVT) and symptom validity testing (SVT) are built into a thorough evaluation to confirm that results reflect genuine effort and consistent symptom reporting. For attorneys, this matters directly. It is often the first thing a defense expert will scrutinize, and having it addressed upfront strengthens the evaluation's credibility rather than leaving it as an open question. Our guide to the anatomy of a defensible neuropsych report breaks down what to look for.
When a case eventually calls for expert witness testimony or a formal impairment rating, this is also where organizations like our affiliated legal support arm, BrainTrust, become relevant. Independent medical examinations and expert testimony carry more weight when they are grounded in objective, validity-tested data rather than clinical impression alone.
Why This Distinction Matters for Building a Case
The Risk of Relying on Imaging Alone
Building a case around imaging results, or worse, treating a normal scan as a weakness to work around, misses where the actual evidence lives. Objective functional testing exists precisely because imaging is not built to capture this type of injury.
Attorneys who wait to address this gap until deposition or mediation often find themselves reacting to a defense narrative instead of controlling it. Ordering functional testing early gives a case its own evidentiary foundation from the start, rather than a defense against someone else's framing.
How Objective Functional Data Supports Causation and Damages
Structured testing can help establish a documented before-and-after picture of a client's cognitive and functional status. That kind of data can support causation arguments and give damages claims a clearer evidentiary foundation, separate from imaging results entirely.
Common Defense Arguments Tied to Normal Scans, and How Objective Testing Addresses Them
Defense counsel will often point to a normal CT or MRI as evidence that an injury is not real or is not significant. Another common argument involves questioning whether reported symptoms are exaggerated or unrelated to the incident. Objective testing directly addresses both. It shifts the conversation from "what does the scan show" to "what does the client's measured function show," and validity testing built into the evaluation speaks directly to the exaggeration argument before it is even raised. No evaluation guarantees a particular case outcome, but it does provide data that speaks to the injury on its own terms.
Questions Attorneys Often Ask About Concussion Evaluation
Can a concussion be real if imaging came back normal?
Yes. Normal imaging is the expected result in most concussion cases, not a sign that an injury did not happen.
What kind of testing should we be requesting for a client with persistent symptoms?
A neuropsychological evaluation and an oculomotor and oculo-vestibular assessment are typically the most relevant starting points for documenting functional impairment.
How long does a full evaluation usually take?
Timelines vary based on the scope of testing and clinical schedule. Our team can walk you through what to expect for a specific case.
Does objective testing guarantee a stronger case outcome?
No evaluation can guarantee a case outcome. What it can do is provide documented, measurable data that speaks directly to the client's condition.
When should we bring in expert testimony or request an impairment rating?
This usually depends on case complexity and where things stand in litigation. Once functional testing has established a clear clinical picture, that data can support a formal expert opinion if the case calls for it.
Where This Leaves Your Case Strategy
A normal CT tells you what did not happen. It does not tell you what your client is actually experiencing, and it was never built to. That distinction is often the difference between a case that stalls on a technicality and one that is backed by real, documented evidence of functional harm.
The tools to close that gap already exist. Oculomotor assessment, neuropsychological evaluation, and validity-tested data give a case something imaging alone cannot: a measurable picture of how an injury is affecting your client's life right now.
Get Objective Documentation Your Case Can Stand On
If you are working a case where imaging came back clean but your client's symptoms have not, that is exactly the gap our evaluations are built to address. All Things Neuro works with attorneys across Georgia and Ohio to provide objective concussion testing referrals and defensible documentation for personal injury and workers' compensation claims.
Ready to discuss a specific case? Contact our team to get started.
- 3535 Peachtree Road NE, Suite 320, Atlanta, GA 30326
- 888-7-CONCUSSION
- allthingsneuro.com
Connect With All Things Neuro
Follow us for ongoing neurotrauma education and updates:
This content is for informational purposes only and does not constitute medical or legal advice. Please consult a qualified healthcare provider for diagnosis and treatment, and legal counsel for case-specific guidance.
