Concussion After a Car Accident — Cityside Chiropractic Rhode Island
Quick Answers — Concussion After a Car Accident
Can you get a concussion in a car accident without hitting your head? Yes. The acceleration-deceleration forces of a collision can produce rotational brain forces sufficient to cause a concussion without any direct head contact.
Will a CT scan show a concussion? No. CT imaging identifies intracranial hemorrhage and structural injury — not concussion. A normal CT does not mean no concussion occurred.
What are the signs of a concussion after a car accident? Headaches, dizziness, light sensitivity, cognitive fog, memory changes, sleep disruption, and visual disturbances — particularly when triggered or worsened by cognitive effort or screen use.
How is a concussion objectively diagnosed? Through computerized oculomotor testing (RightEye), vestibular assessment (BTrackS), and cognitive testing (CNS Vital Signs) — which identify functional neurological deficits not visible on standard imaging.
Can concussion symptoms appear days after a car accident? Yes. Concussion symptoms frequently develop or become more apparent in the 24 to 72 hours following a collision as the acute stress response subsides.
What Is a Concussion After a Car Accident?
A concussion is a functional brain injury caused by mechanical forces applied to the brain during a motor vehicle collision. It disrupts neurological function without producing structural changes visible on standard CT or MRI imaging.
Concussion in car accidents occurs through the rapid acceleration-deceleration of the skull and brain — producing rotational forces on brain tissue that disrupt normal neurological function. This mechanism does not require a direct head impact. A rear-end collision at speed produces sufficient rotational forces to cause a concussion in the occupant without the head contacting any surface.
What Is the Difference Between Concussion and TBI?
Concussion is classified as mild traumatic brain injury (mild TBI) — a functional neurological disruption without structural brain damage on imaging. More severe TBI involves longer loss of consciousness, extended post-traumatic amnesia, and structural changes visible on imaging.
The "mild" classification does not mean minor consequences. Mild TBI — concussion — can produce post-concussion syndrome lasting months or years with significant functional impact on work, driving, and daily life.
Why Standard Exams Miss Car Accident Concussion
Emergency evaluation appropriately focuses on ruling out intracranial hemorrhage and structural injury — findings that require immediate medical intervention. These evaluations are not designed to detect concussion, which is a functional injury invisible to CT and standard neurological examination at the emergency level.
Standard neurological examination tests for gross neurological compromise. It does not evaluate smooth pursuit accuracy, saccadic function, fixation stability, or vestibular-ocular reflex integrity — the specific functional measures that identify concussion most sensitively.
A car accident patient who receives a negative CT and passes a standard neurological examination has not been evaluated for concussion. They have been evaluated for bleeding and gross neurological failure — different clinical questions entirely.
How Cityside Chiropractic Evaluates Concussion After a Car Accident
RightEye Computerized Vision Tracking evaluates the oculomotor system — smooth pursuit accuracy, saccadic function, fixation stability, and visual reaction time. These measures are among the most sensitive objective indicators of concussion available in a clinical setting. Results are compared to age-matched normative databases, producing percentile scores.
BTrackS Computerized Balance Assessment quantifies vestibular and neurological dysfunction through force plate measurement of postural stability under progressively challenging conditions. Balance deficits outside normative ranges indicate neurological dysfunction consistent with post-concussion involvement.
CNS Vital Signs Computerized Cognitive Assessment evaluates processing speed, working memory, complex attention, and reaction time — identifying the cognitive deficits that characterize post-concussion syndrome and quantifying their severity against normative benchmarks.
When post-concussion syndrome is established through objective testing, neurological referral is recommended for coordinated management. RightEye findings indicating oculomotor dysfunction are documented with referral to neuro-ophthalmology or neurology as indicated.
Case Example — Headaches After a Car Accident
A patient was involved in a rear-end collision. No direct head contact. CT was negative. The patient returned to work three days later but found sustained computer work produced immediate headaches, fluorescent lighting was intolerable, and the highway commute produced visual discomfort at speeds that were entirely new.
RightEye evaluation revealed smooth pursuit accuracy below the 8th percentile. BTrackS showed a balance deficit outside the normative range. CNS Vital Signs processing speed was below average for age.
Post-concussion syndrome was established as the clinical diagnosis through objective testing — directing appropriate management and providing documented neurological findings for the personal injury record. Neurological referral was initiated for coordinated post-concussion management.
Frequently Asked Questions
Can concussion occur in a low-speed car accident? Yes. The rotational brain forces associated with concussion are produced by the rapid deceleration of the skull — which can occur at relatively low collision speeds, particularly when the occupant does not see the collision coming and cannot brace.
How long does concussion last after a car accident? Most concussions resolve within 2 to 4 weeks. Approximately 15 to 25 percent develop post-concussion syndrome with symptoms beyond one month. Early objective evaluation and appropriate management improve recovery outcomes.
Is post-concussion syndrome the same as concussion? Post-concussion syndrome refers to the persistence of concussion symptoms beyond the typical acute recovery period — generally beyond 3 to 4 weeks. It is a recognized clinical diagnosis with specific management implications.
For Personal Injury Attorneys
Concussion following a car accident is among the most difficult injuries to document and among the most aggressively contested by insurance carriers — precisely because standard imaging is negative and symptoms are largely subjective without objective testing.
RightEye, BTrackS, and CNS Vital Signs transform subjective concussion complaints into measured neurological deficits with normative comparisons. These findings are the clinical foundation of concussion documentation in Rhode Island PI cases.
This page provides general educational information and does not constitute medical or legal advice.
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