EEG and Traumatic Brain Injury Detection in McAllen

Written by Geoffrey Dashner. Read more about the author.

After a car accident or a bad fall, one of the first questions I hear from injured clients is some version of: “The ER did a CT scan and said it looked fine — so why do I still feel this way?” That gap between what standard imaging shows and what the patient actually experiences is something I deal with regularly at Dashner Law Firm | McAllen Injury & Accident Attorney. It shapes how we build cases and how we advise clients on getting the right medical workup.

If a doctor has mentioned an EEG, or if you are trying to understand what tests can actually detect a brain injury after an accident in McAllen, this post explains what you need to know — medically and legally — in 2026.

Can an EEG Detect Traumatic Brain Injury in McAllen?

Yes, an EEG (electroencephalogram) can detect certain effects of traumatic brain injury, but it does not work the same way an MRI or CT scan does, and understanding that difference matters enormously for your health and your legal case.

An EEG measures electrical activity in the brain through electrodes placed on the scalp. It records brainwave patterns and can identify abnormalities — such as slowing of activity, asymmetry between hemispheres, or epileptiform discharges — that are associated with TBI. According to research published through the National Institutes of Health, post-traumatic EEG abnormalities are found in a significant percentage of moderate-to-severe TBI patients, and even in some mild TBI cases.

What EEG cannot do is show structural damage the way a scan can. It does not photograph the brain. What it measures is function — how the brain’s electrical signals are behaving. A patient can have a normal-looking CT scan and still show meaningful EEG abnormalities. That combination — normal imaging but abnormal EEG — is something I have seen in multiple client cases, and it is clinically significant.

In McAllen, neurologists at facilities like South Texas Health System and Rio Grande Regional Hospital can order and interpret EEGs. Neuropsychological testing is often ordered alongside an EEG to build a fuller picture of cognitive function. For legal purposes, documented EEG abnormalities can serve as objective evidence that the brain was affected — which matters when an insurance adjuster is trying to argue that a TBI claim is exaggerated or unsupported.

EEGs are also particularly relevant for detecting post-traumatic seizure activity. The CDC reports that TBI is one of the leading causes of acquired epilepsy in the United States. If you experienced a seizure after your accident and an EEG confirms abnormal electrical patterns, that finding alone significantly strengthens a compensation claim.

The bottom line: an EEG is a valuable diagnostic tool for TBI, especially for cases that involve cognitive symptoms or seizure risk, and especially when CT or MRI results come back unremarkable. If your doctor has not discussed one and you are still experiencing symptoms weeks or months after an accident, ask specifically about a neurological referral.

What Is a Traumatic Brain Injury?

A traumatic brain injury is physical damage to the brain caused by an external force — a blow, jolt, or penetrating object. The brain shifts inside the skull, and that movement can tear nerve fibers, rupture blood vessels, or cause bruising to brain tissue.

TBI is classified as mild, moderate, or severe based on several clinical markers: loss of consciousness, length of post-traumatic amnesia, Glasgow Coma Scale scores, and imaging findings. Mild TBI — which includes what most people call a concussion — does not mean the injury is trivial. It means the acute episode did not result in extended unconsciousness. The long-term effects can still be substantial.

The Mayo Clinic identifies common symptoms of TBI as headaches, confusion, memory problems, mood changes, sleep disturbances, and sensitivity to light and sound. These can appear immediately or, in some cases, days after the initial trauma. That delayed presentation is one reason clients sometimes do not connect their symptoms to an accident — and why prompt medical evaluation matters.

What Causes Traumatic Brain Injury in Texas Accidents?

In Texas, the most common causes of TBI in accident cases mirror national patterns but have some regional specifics worth understanding.

Motor vehicle collisions are the leading cause. On I-2 and US-83 near McAllen, high-speed collisions are not uncommon, and rear-end crashes — even at moderate speeds — generate enough force to cause the brain to strike the inside of the skull. Texas Car Accident Attorneys handle a significant volume of TBI claims that originate from seemingly routine crashes.

Commercial truck accidents are a separate and more severe category. An 80,000-pound loaded semi creates forces during a collision that far exceed what a passenger vehicle generates. Texas Truck Accident Attorneys often deal with moderate-to-severe TBI cases precisely because of those force differentials. The Rio Grande Valley sees heavy commercial traffic given its proximity to the border crossing at Hidalgo, which adds to accident frequency in the region.

Falls are another major cause, particularly at construction sites. Texas Construction Accident Attorneys regularly handle cases where workers fell from scaffolding, ladders, or elevated platforms and sustained TBI. OSHA data consistently places falls as the number-one cause of construction fatalities in Texas.

Pedestrian accidents involving vehicles are also a significant source of TBI in the Rio Grande Valley. Texas Pedestrian Accident Attorneys handle these cases frequently because a pedestrian struck by a vehicle has essentially no protection against head impact — either from the vehicle itself or from the pavement.

Is a Concussion a Traumatic Brain Injury?

Yes. A concussion is a mild traumatic brain injury. The word “mild” refers to the severity classification, not to the impact on the person’s life.

Clinically, a concussion involves a temporary disruption of normal brain function following a force to the head. The person may or may not lose consciousness — and most concussions do not involve loss of consciousness at all. What defines a concussion is the neurological symptoms: confusion, disorientation, headache, nausea, and cognitive fog immediately following the trauma.

Johns Hopkins Medicine notes that while most concussion symptoms resolve within weeks, a meaningful subset of patients develop post-concussion syndrome — a condition where symptoms persist for months or longer. Chronic headaches, difficulty concentrating, depression, anxiety, and sleep disruption are among the ongoing effects.

From a legal standpoint, defense attorneys and insurance companies frequently try to minimize concussion claims. They use language like “no structural brain injury” or point to a clean MRI as proof that nothing serious happened. That framing ignores the clinical evidence on post-concussion syndrome and the functional disruption it causes. I have handled cases where a client missed months of work due to a concussion that showed nothing on imaging, and we were still able to document the injury and its effects through neuropsychological testing, EEG findings, and physician records.

If you sustained a concussion in an accident in McAllen that has affected your ability to work, concentrate, or function normally, do not accept a quick settlement before you understand the full scope of your injury. Contact us before signing anything.

What Are the Long-Term Effects of Traumatic Brain Injury?

The long-term picture of TBI varies significantly based on injury severity, the person’s age at the time of injury, and the quality of follow-up care they receive.

For moderate and severe TBI, the consequences can include permanent cognitive deficits — problems with memory, executive function, language, and processing speed. Personality changes are common and often more disruptive to family relationships than the physical symptoms. Depression and anxiety occur at rates substantially higher than in the general population, according to data from the CDC. Post-traumatic epilepsy affects roughly 10–15% of severe TBI survivors.

There is also growing medical recognition of the link between repeated or severe TBI and neurodegenerative conditions later in life. Research published through the NIH has examined the relationship between TBI history and elevated risk of Alzheimer’s disease and Parkinson’s disease, though this area of research is still developing.

For mild TBI, many people do recover fully within three months. But a substantial minority — estimates vary, but some studies suggest 15–30% of mild TBI patients — experience symptoms beyond that window. Vocational impact is real: memory problems and concentration difficulties can affect job performance for professionals, tradespeople, and anyone who works in cognitively demanding environments.

In legal terms, these long-term effects translate into ongoing medical costs, lost earning capacity, and quality of life damages. Calculating those figures accurately requires expert testimony from neurologists, neuropsychologists, and vocational rehabilitation specialists. That is a significant part of what a Texas brain injury attorney does in building a damages case.

Is Traumatic Brain Injury Permanent?

It depends entirely on the severity of the injury and the individual’s neurological recovery capacity.

Some TBI patients make full recoveries, particularly those with mild injuries who receive prompt treatment and adequate rest during the acute phase. The brain has some degree of neuroplasticity — the ability to reorganize and compensate for damaged areas — and this capacity is generally higher in younger patients.

Severe TBI, however, frequently results in permanent deficits. A patient with a diffuse axonal injury — the widespread shearing of nerve fibers that occurs in high-velocity collisions — often faces lifelong cognitive, motor, and emotional impairments. Traumatic brain injuries that result in prolonged coma or vegetative state carry the worst prognoses for full recovery.

WebMD notes that rehabilitation — including physical therapy, occupational therapy, speech-language therapy, and cognitive rehabilitation — can significantly improve function even in serious TBI cases, but it does not always restore pre-injury baseline.

For families dealing with a catastrophic brain injury after a Texas accident, the financial burden of permanent care is significant. Lifetime care costs for severe TBI can run into the millions. That is exactly the kind of case where having an experienced Texas catastrophic brain injury attorney on your side — someone who knows how to project those future costs accurately and fight for full compensation — can make the difference between a settlement that covers your needs and one that runs out in five years.

How Brain Injury Claims Work Under Texas Law?

Texas personal injury law operates under a modified comparative fault system. Under Texas Civil Practice & Remedies Code § 33.001, you can recover damages as long as your percentage of fault does not exceed 50%. Your compensation is then reduced by your share of fault. So if you were 20% at fault for an accident and your damages total $500,000, you recover $400,000.

Texas also has a two-year statute of limitations for personal injury claims under § 16.003 of the Texas Civil Practice & Remedies Code. For TBI cases, this matters because symptoms sometimes do not fully manifest until weeks or months after the accident — and people sometimes delay seeking legal advice because they hope symptoms will resolve. Do not let the clock run out. If you were injured in an accident in McAllen, speak with a brain injury attorney in Texas sooner rather than later.

For more general guidance on injury law, FindLaw and Justia maintain useful state-level legal resources, and Cornell Law School’s Legal Information Institute provides accessible explanations of tort law principles.

What a Brain Injury Lawyer Actually Does on These Cases?

I want to be direct about this because the role is often misunderstood.

A brain injury compensation lawyer is not just a paperwork processor. On TBI cases, the attorney’s job includes: identifying the right medical experts, ensuring the client gets the diagnostic testing they actually need (including EEG and neuropsychological evaluation if warranted), preserving evidence before it disappears, handling communication with insurance companies so the client does not inadvertently undermine their claim, and calculating damages that reflect the full long-term picture — not just current medical bills.

One mistake I see regularly is clients who accept early settlement offers without understanding that post-concussion symptoms can last years, or that a “mild” TBI can still result in significant lost wages. Insurance companies are not in the business of volunteering the maximum value of your claim. That information has to be developed through medical documentation and legal advocacy.

You can see how we approach cases — and what outcomes we have achieved for clients — in our verdicts and settlements. You can also learn more about our team and our practice background if you want to understand who you would be working with.

We serve clients throughout Texas, and our personal injury practice covers a range of accident types. If your injury arose from a situation like a DWI crash, our Texas DWI accident attorneys handle those specific circumstances as well.

Talk to a Brain Injury Lawyer in McAllen

If you or someone close to you sustained a brain injury in an accident in Texas, the decisions you make in the weeks following that injury will affect your recovery — financially and medically. Getting the right diagnostics, preserving the right evidence, and having legal counsel who understands TBI are all part of that process.

Dashner Law Firm | McAllen Injury & Accident Attorney works with brain injury victims across the Rio Grande Valley and throughout Texas. We offer free consultations, and we handle brain injury cases on a contingency basis — you pay nothing unless we recover for you.

Call our McAllen team at (956) 303-6170, or schedule a consultation online. You can also visit us in person at 813 N Main St #608, McAllen, TX 78501.

The consultation is free. The information you get from it is not.