What Concussion Screening Can—and Cannot—Determine After a Car Accident

Headache, dizziness, visual discomfort, balance problems, fatigue, slowed thinking, and concentration difficulty can occur after a motor-vehicle collision. Those symptoms deserve careful assessment, but no single screening test should be treated as stand-alone proof of concussion or traumatic brain injury.

Screening is not the same as diagnosis

Concussion is a clinical diagnosis. Screening tools can identify symptom patterns or measurable functional abnormalities that increase concern and help determine whether additional medical evaluation is appropriate. They can support decision-making, but they do not replace history, examination, differential diagnosis, or medical judgment.

What Cityside may screen

Depending on the patient’s symptoms, Cityside may use symptom questionnaires, cranial-nerve and neurologic screening, balance assessment, oculomotor testing, neurocognitive screening, and cervical examination. These different components look at different aspects of function. None should be interpreted in isolation.

What an abnormal result can mean

An abnormal balance score may indicate impaired postural control, but it does not identify one specific cause. Oculomotor abnormalities can occur in multiple conditions and must be interpreted in context. Neurocognitive performance can be affected by sleep, pain, medication, anxiety, effort, prior neurologic history, language, and other factors. A symptom score can document burden and change over time, but it does not by itself establish a diagnosis.

What screening cannot prove

A screening result should not be presented as automatic proof of concussion, brain injury, collision causation, permanency, disability, or legal damages. Those are separate questions that require different types of evidence.

Why cervical injury matters

Whiplash and concussion can share symptoms such as headache, dizziness, visual sensitivity, fatigue, and difficulty concentrating. Cervical dysfunction can also contribute to headache and dizziness. That overlap is one reason a post-collision evaluation should not assume that every symptom is coming from the brain or, conversely, that every symptom is coming from the neck.

When referral becomes the priority

Emergency or urgent medical evaluation is appropriate when symptoms suggest a potentially serious neurologic or systemic problem. Persistent or significant post-concussion symptoms may also warrant coordinated evaluation with primary care, neurology, physiatry, vestibular rehabilitation, neuropsychology, vision specialists, or other clinicians as appropriate.

How screening can still be valuable

Used carefully, screening can establish a baseline, identify patterns that deserve medical attention, help track change over time, and provide more objective information about function. Its value comes from helping answer clinical questions—not from turning a complex diagnosis into a single number.

At Cityside, concussion-related testing is intended to support screening, monitoring, and referral decisions within the broader clinical picture.