How Coup-Contrecoup Brain Injuries Happen Even in Low-Speed Collisions
“The car barely has a scratch, so I must be fine.” It is one of the most common things people say after a fender bender, and one of the most misleading. Your brain doesn’t care how much the bumper cost to fix. It cares how quickly your head changed speed. At Snyder Heitman LLC, our Greenville brain injury attorneys regularly meet people who walked away from a “minor” crash and then spent weeks wondering why they couldn’t concentrate, sleep, or remember simple things.
Two Injuries From One Impact
The brain sits inside the skull cushioned by fluid, but it is not fixed in place. When your head stops or starts suddenly, the brain keeps moving and strikes the inside of the skull. That first point of contact produces a coup injury. The brain then rebounds and strikes the opposite side, producing a contrecoup injury. A clinical review published by the National Library of Medicine explains that contrecoup injuries occur away from the actual point of impact, usually when a head already in motion is suddenly stopped, and that case reports have documented contrecoup injuries with no coup injury at all.
In a car, the thing that stops your head might be a headrest, a side window, or simply the end of your neck’s range of motion. Nobody has to hit their head on anything visible for this to happen.
Why Low Speeds Still Matter
It is natural to assume injury scales neatly with speed. In practice, several factors shape how hard the brain is jolted:
- Whether you saw the collision coming and braced, or were caught completely off guard
- Head position at impact, such as turned toward a child in the back seat
- Seat and headrest height relative to the back of your head
- Stiff modern bumpers that resist damage, which means less energy is absorbed by the car and more by the people inside it
- Age and prior concussions, which can leave the brain more vulnerable
A rear-end tap at a Woodruff Road stoplight can check several of these boxes at once.
Symptoms That Show Up Late
Contrecoup injuries frequently involve the frontal and temporal lobes, which handle judgment, mood, and memory. That is why family members sometimes notice changes before the injured person does: irritability, forgetfulness, trouble finding the right word. Headaches and light sensitivity may not peak until a day or two later.
That delay creates a real problem for injury claims. Insurance adjusters pay close attention to the gap between a crash and a diagnosis, and they often point to a low repair estimate as proof no one could have been hurt. Getting evaluated promptly and describing every symptom to your doctor helps close that gap. South Carolina generally allows three years to file a personal injury lawsuit under S.C. Code § 15-3-530, but evidence and memories fade far faster than that.
You Deserve Answers, Not a Runaround
If something has felt off since your crash, trust that instinct and see a doctor first. When you are ready to talk about what comes next, call us. You will speak with someone who listens, not a call center, and we will walk you through how these injuries are documented and valued. Our Greenville brain injury lawyers welcome clients from Greenville, Simpsonville, Spartanburg, and all communities across Upstate South Carolina.
Source:
ncbi.nlm.nih.gov/books/NBK536965/