Delayed Diagnosis and Objective Multimodal Assessment of Post-Concussion Syndrome Following Motor Vehicle Collision: A Case Report

This case report presents a 53-year-old female who sustained a traumatic brain injury (TBI) in December 2022 following a high-impact motor vehicle collision. Although she experienced immediate post-traumatic symptoms, including dizziness, confusion, and visual disturbance, her TBI went undiagnosed for over 10 months. She presented for care at a concussion rehabilitation clinic with persistent cognitive, vestibular, autonomic, and emotional symptoms. A battery of objective diagnostic tools including EEG, VNG, HRV, Brain Check, C3 Logix, and UPSIT identified diffuse neurological dysfunction. The patient completed a 10-week multimodal neurorehabilitation program tailored to her diagnostic profile. Post-treatment assessments demonstrated clinically meaningful improvements in symptom burden, cognitive function, and autonomic regulation. This case underscores the clinical utility of functional diagnostics and personalized multimodal therapy, even when initiated outside the typical post-concussion therapeutic window.