Concussions in Car Accidents

What Happens to Your Brain During a Car Crash

Your brain floats inside your skull, cushioned by cerebrospinal fluid. In a car crash, the violent deceleration forces your skull to stop suddenly — but your brain keeps moving. It collides with the inside of the skull, then bounces back. This rapid back-and-forth stretches and damages brain cells, disrupts electrical signals, and triggers chemical changes at the cellular level.

You don’t need to hit your head on anything. The crash forces alone — the acceleration and deceleration — are enough. NHTSA biomechanics research has documented that significant brain injury can occur without any direct head contact. This is why so many crash victims develop concussion symptoms after a collision where no head strike was observed.

Side-impact crashes, rear-end collisions, and rollovers all produce different force patterns — but all of them can cause concussions. In a rear-end collision, the head snaps backward then forward. In a side impact, the head whips laterally. Each pattern creates different stress on different brain regions, which is why concussion symptoms vary so much from person to person.

Concussion Symptoms: What to Watch For

Concussion symptoms don’t always show up immediately. The CDC’s clinical guidance confirms that symptoms are often most severe 24–48 hours after injury — and in some cases don’t appear until days later. This delay is one of the main reasons people underestimate these injuries and why insurance companies try to use the delay against them.

Physical Symptoms

• Headache or pressure in the head — often described as different from any headache before the crash
• Dizziness, balance problems, or feeling unsteady
• Nausea or vomiting, especially in the first few hours
• Sensitivity to light (photophobia) and sensitivity to noise (phonophobia)
• Blurred or double vision
• Fatigue — feeling drained by activities that were previously effortless
• Ringing in the ears (tinnitus)

Cognitive Symptoms

• Memory gaps — not remembering the crash itself, or new information after it
• Difficulty concentrating or staying on task
• Feeling mentally “foggy” or slowed down
• Word-finding problems — searching for words in conversation
• Slowed reaction times
• Trouble following multi-step instructions or multitasking

Emotional and Behavioral Symptoms

• Irritability, mood swings, or feeling more emotional than usual
• Anxiety or nervousness that’s new since the crash
• Sadness or depression
• Personality changes noticed by family, friends, or coworkers

Sleep Disruption

• Trouble falling asleep or staying asleep
• Sleeping much more than usual
• Waking unrefreshed even after a full night’s sleep

Why CT Scans Miss Concussions

The most important thing to understand about concussions: a normal CT scan does not mean you weren’t injured. CT scans are designed to detect structural problems — bleeding inside the skull, bone fractures, large swelling. A concussion is a functional injury: damage at the cellular and chemical level that disrupts how the brain works without changing how it looks on a scan.

According to the CDC, the vast majority of concussions produce completely normal CT results. This is well-established in neurological medicine. But insurance companies consistently use “normal CT” as a reason to deny, minimize, or dispute your claim.

What actually documents a concussion’s impact:

• Neuropsychological testing — measures memory, attention, processing speed, and executive function, providing objective data on cognitive deficits
• Vestibular testing (VNG) — tracks eye movements to detect dysfunction in the balance and visual systems caused by brain injury
• Oculomotor assessment — identifies convergence insufficiency and eye-tracking problems common after mTBI
• Advanced MRI (DTI, SWI) — can detect subtle white matter damage and microbleeds invisible on standard scans
• FDA-cleared blood biomarkers (GFAP/UCH-L1) — can help identify who needs a CT scan within the first 12 hours post-injury

A well-documented concussion case builds a picture from multiple sources — not just imaging. That’s how you prove it to an insurance adjuster, and it’s how you prove it to a jury.

Post-Concussion Syndrome: When Symptoms Don’t Go Away

Most people with a concussion recover within 2–4 weeks with appropriate care. But a meaningful percentage — clinical research estimates 10–15% — develop post-concussion syndrome (PCS), where symptoms persist for months or even years. PCS is not in your head. It represents ongoing disruption of brain function that has not fully resolved.

Symptoms of PCS are the same as acute concussion symptoms, but they persist beyond the expected recovery window. The condition can significantly affect your ability to work, maintain relationships, and enjoy daily life. PCS is well-recognized by the CDC and medical community and can be documented through the same functional testing used for initial concussion assessment.

From a legal standpoint, PCS dramatically changes the value of a claim. When symptoms persist, future medical costs for treatment, cognitive rehabilitation, vestibular therapy, and pain management all become compensable. Long-term damages — including ongoing lost earning capacity and permanent changes to quality of life — are all on the table.

How We Prove a Concussion Case

Concussion cases are won or lost on medical documentation. The stronger the objective evidence connecting the crash to your functional deficits, the harder it is for an insurance company to dispute your claim.

1. Preserve crash evidence immediately

   Accident reconstruction, event data recorder (black box) data, traffic camera footage, and the police report all establish the forces involved in the crash — foundational evidence for any brain injury claim.

2. Seek the right medical providers

   An ER visit establishes the initial record. Follow-up with a neurologist or concussion clinic that uses vestibular, oculomotor, and neuropsychological testing provides the objective data that matters most in building your case.

3. Document symptoms systematically

   A daily symptom journal — tracking headache intensity, sleep quality, cognitive performance, and emotional state — creates a contemporaneous record that carries significant weight. Start one the day of the crash.

4. Gather collateral observations

   Structured accounts from spouses, family members, coworkers, and supervisors who have noticed changes in your behavior, memory, and performance since the crash are often the most persuasive evidence in a concussion case. Third-party observations beat self-reports every time.

5. Address liens and subrogation proactively

   Under Kentucky law (KRS 411.188), we work to challenge and reduce medical liens so the money we recover actually stays with you. Health insurance subrogation, Medicaid liens, and ERISA plan claims are all managed as part of your representation.

What a Concussion Case Can Recover

Kentucky does not cap compensatory damages in personal injury cases. The value of your concussion claim depends on the real impact the injury has had on your life. Recoverable damages typically include:

• All medical expenses — ER, specialist visits, imaging, neuropsychological testing, vestibular therapy, cognitive rehabilitation, medications
• Future medical costs — ongoing treatment for PCS, future care if symptoms persist
• Lost wages — income lost during recovery, missed work days, reduced hours
• Lost earning capacity — if cognitive deficits have permanently reduced your ability to perform your job
• Pain and suffering — physical pain, emotional distress, PTSD, and loss of enjoyment of life
• Long-term damages — future care costs, quality of life impacts, and neurodegenerative risk factors

If your concussion occurred alongside other injuries — whiplash, herniated discs, or other crash-related damage — those injuries combine with your concussion to form the full picture of what you’re owed.

You also have a limited window. Kentucky’s statute of limitations generally gives you two years from the crash — or from the date of the last PIP payment, whichever is later — to file suit. Don’t wait.