Quantitative EEG (qEEG) Testing in Houston

When brain symptoms persist but imaging looks “normal,” the problem is often functional—not structural.

At St. Michael Clinics, Quantitative EEG (qEEG) is used to identify abnormal brain activity patterns that traditional MRI and CT scans cannot detect. This advanced neurodiagnostic tool plays a critical role in evaluating concussion, traumatic brain injury, cognitive impairment, and complex neurological conditions.

We provide qEEG testing for patients throughout Houston, Sugar Land, Clear Lake, and the Texas Medical Center.

What Is Quantitative EEG?

Quantitative EEG (qEEG) is an advanced form of electroencephalography that measures and analyzes the brain’s electrical activity in real time.

While standard EEG relies on visual inspection of raw waveforms, qEEG applies computerized, mathematical analysis to extract objective data about:

Brainwave speed and power

Functional connectivity between brain regions

Timing and coordination of neural activity

The result is a detailed functional map of brain performance, allowing clinicians to identify abnormalities that may explain persistent symptoms.

How qEEG Is Different From MRI or CT

MRI and CT scans show brain structure.
qEEG evaluates brain function.

Many conditions, especially concussion and mild TBI—cause disruptions in how the brain communicates rather than visible damage. qEEG helps identify:

Cortical dysregulation

Abnormal neural networks

Delayed or inefficient information processing

This makes qEEG especially valuable when patients are told “everything looks normal,” but symptoms continue.

When Quantitative EEG Is Recommended

qEEG is commonly used in the evaluation of:

Traumatic Brain Injury and Concussion

Mild, moderate, or severe TBI

Post-concussion syndrome

Persistent headaches, dizziness, or cognitive complaints

Objective documentation of brain dysfunction

Epilepsy and Seizure Disorders

Identification of abnormal electrical activity

Localization of seizure focus

Treatment planning and monitoring

Cognitive Impairment and Memory Disorders

Mild cognitive impairment

Alzheimer’s disease and other dementias

Early detection of functional decline

Attention and Neurodevelopmental Disorders

Attention-deficit/hyperactivity disorder (ADHD)

Autism spectrum disorder

Executive function impairments

Mood and Psychiatric Conditions

Depression

Bipolar disorder

Anxiety-related dysregulation

Sleep Disorders

Insomnia

Disrupted sleep architecture

Sleep-related neurological conditions

Medication and Treatment Monitoring

Evaluating the neurological effects of psychotropic medications

Monitoring brain response to treatment

Occupational and Sports-Related Neurology

Cognitive fatigue and mental overload

Return-to-work or return-to-play evaluation

What Happens During a qEEG Test?

qEEG testing is non-invasive, painless, and typically well tolerated.

Electrode Placement

A specialized EEG cap or adhesive electrodes are placed on the scalp to record electrical signals generated by neurons in the brain.

Data Recording

Brain activity is recorded while you are at rest and, in some cases, during specific tasks. Recordings may be taken with eyes open and closed.

Signal Processing

The recorded EEG data is carefully cleaned to remove artifacts such as eye movement or muscle activity, ensuring accuracy.

Quantitative Analysis

Advanced algorithms analyze:

Power across different frequency bands

Connectivity between brain regions

Timing and synchronization of neural signals

Brain Mapping

Topographic maps visually display areas of abnormal brain activity, helping identify regions of dysfunction.

Comparison to Normative Databases

Your results are compared to age-matched normative databases to determine whether findings fall outside normal limits.

Clinical Interpretation

A board-certified neurologist with expertise in brain injury and cognitive neurology interprets the data in the context of:

Symptoms

Medical history

Neurological examination

Other diagnostic findings

Comprehensive Reporting

A clear, detailed report is generated to guide diagnosis, treatment planning, and, when appropriate, legal documentation.

Why qEEG Matters in Brain Injury and Cognitive Care

qEEG provides:

Objective evidence of brain dysfunction

Greater sensitivity in mild TBI and concussion

Insight into symptom mechanisms

Guidance for targeted rehabilitation and therapy

Reliable data for complex or disputed cases

It bridges the gap between symptoms and diagnosis.

Common Questions About Quantitative EEG

Is qEEG safe?

Yes. qEEG is non-invasive, does not use radiation, and is considered very safe.

How long does a qEEG test take?

Most qEEG studies take between 60 and 90 minutes, including setup and recording.

Can qEEG detect concussion or mild TBI?

Yes. qEEG is particularly useful in identifying functional brain abnormalities associated with concussion and mild traumatic brain injury.

Do I need abnormal MRI or CT results to have qEEG?

No. qEEG is often used specifically when imaging appears normal but symptoms persist.

Do you offer qEEG testing in Houston?

Yes. St. Michael Clinics provides advanced quantitative EEG testing for patients across the Houston area.