Quantitative EEG (qEEG) for Brain Injury Assessment
qEEG applies statistical analysis to EEG data, comparing a patient's brain activity to normative databases to help characterize functional changes a structural scan can't measure.
How qEEG Differs From a Standard EEG
A standard EEG records the brain's raw electrical activity, and a neurologist reviews that recording visually for identifiable patterns such as seizure activity. Quantitative EEG, or qEEG, takes that same electrical data and applies statistical analysis: the recorded signal is broken down into measurable features, such as frequency, power, connectivity, and signal complexity, and compared against normative databases built from large samples of people without known neurological injury.
What qEEG Can Help Identify After Concussion or TBI
Following a concussion or TBI, a patient's CT or MRI frequently comes back normal, even when real symptoms persist, because structural imaging isn't designed to detect changes in how the brain's electrical systems are functioning. qEEG is one of the tools that can help characterize patterns of brain signaling that may be altered after injury even when the brain's physical structure looks unremarkable. According to PubMed, a 2024 study in JAMA Network Open used quantitative EEG features, including power, connectivity, and signal complexity, to identify distinct resting-state subtypes among patients with concussion, finding that subtype membership was significantly associated with time to return to activity (Armañanzas et al., 2024, DOI). This research supports qEEG's role as a meaningful, evolving tool for characterizing concussion physiologically; it does not mean qEEG can predict any individual patient's outcome or recovery timeline, and NeuroLUX does not use it to make such predictions.
How qEEG Is Used at NeuroLUX
qEEG is never interpreted as a standalone test at NeuroLUX. It's always reviewed by one of our board-certified neurologists alongside the patient's full clinical history, symptom presentation, standard EEG findings, and any other diagnostic testing performed. qEEG testing is available in our Irving clinic and through mobile testing for patients who cannot travel. For attorneys and referring providers handling personal injury, letter-of-protection, or IME cases, qEEG findings interpreted and reported directly by a NeuroLUX neurologist can add an objective, physiologically grounded data point to a patient's diagnostic record.