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You have had a qEEG brain mapping assessment and you are now looking at colour-coded brain maps, frequency graphs, and Z-scores. It looks complex — but it is actually telling a straightforward story once you know how to read it.
A brainwave report is a statistical picture of how your brain’s electrical activity compares to a healthy norm for your age. Every colour, number, and frequency band is showing you something specific about how your brain is currently functioning — and what a personalised neurofeedback protocol will target to help it function better.
The Six Brainwave Bands — What Each One Does
Your brain produces electrical activity across six main frequency bands simultaneously, each measured in Hertz (Hz). Your qEEG report maps the amplitude (power) of each band at every electrode site across your scalp — revealing where each frequency is appropriately active, overactive, or underactive.
| Wave | Hz | Healthy Role | Dysregulation Linked To |
| Delta | 0.5–4 | Deep restorative sleep | TBI, depression, learning disorders (excess awake); poor sleep (deficit) |
| Theta | 4–8 | Creativity, memory, light relaxation | ADHD inattention, brain fog (excess); anxiety, stress (deficit) |
| Alpha | 8–12 | Calm alert state, mind-body balance | ADD/depression frontal excess; anxiety, insomnia (deficit) |
| Beta | 12–30 | Active thinking, problem-solving | Anxiety, OCD, rumination (excess); fatigue, poor focus (deficit) |
| High Beta | 25–35 | Intense focus (brief bursts only) | Panic, hyperarousal, PTSD, phobia, amygdala overactivation (excess) |
| Gamma | 30–100 | Cognitive integration, memory binding | Disrupted in schizophrenia, Alzheimer’s; low in cognitive impairment |
The clinical insight is not which band is present — all of them are, at all times — but whether each is appropriately balanced relative to the norm for your age, and in which specific brain regions imbalances occur.
How to Read the Colour Brain Map
The colour-coded maps are produced by comparing your qEEG data to a normative database: a reference collection of EEG recordings from neurologically healthy individuals your age, processed using Fast Fourier Transform (FFT) spectral analysis. Deviations from that norm are visualised in colour.
| Map Colour | What It Means | Z-Score Range |
| Green | Within normal range for your age | Between -2 and +2 (healthy norm) |
| Red / Orange | Overactive — excess of this frequency here | +2 or above (above 97.5th percentile) |
| Blue | Underactive — deficit of this frequency here | -2 or below (below 2.5th percentile) |
A map that is mostly green means your brain’s activity in that frequency band is well-regulated across most regions. Red or orange clusters signal overactivation — too much of that frequency. Blue clusters signal underactivation — too little.
For example: red at the right temporal lobe in the high-beta band suggests amygdala-linked hyperarousal — common in anxiety and PTSD. Blue at the left frontal region in the alpha band indicates left DLPFC underactivation — the depression signature. Red at the frontal region in the theta band is the classic ADHD inattention finding.
What Are Z-Scores and Why Do They Matter?
Every data point on your report is expressed as a Z-score: a statistical measure of how far your brain’s activity deviates from the healthy mean for your demographic. Z-score of 0 = exactly average. Z-score of +2 or above = your brain produces more of that frequency than 97.5% of healthy peers. Z-score of -2 or below = it produces less.
Z-scores are what transform raw EEG data into clinically meaningful, personalised information. Without them, a clinician reads waveforms visually — as in a standard hospital EEG. With Z-scores, the report quantifies exactly how significant each deviation is, in which region, at which frequency. This is the clinical foundation of a genuinely personalised neurofeedback protocol.
Four Common Brainwave Patterns and What They Suggest
Elevated Frontal Theta — The ADHD Signature
Excess theta (4–8 Hz) at frontal electrode sites — a high theta/beta ratio — is the most replicated EEG biomarker of ADHD inattention. Excess slow-wave activity in the frontal executive region explains the persistent difficulty with focus, organisation, and impulse control that ADHD patients experience.
High-Beta Excess at Temporal Sites — The Anxiety Signature
Elevated high-beta (25–35 Hz) at temporal electrodes T3 and T4 reflects overactivation linked to amygdala reactivity — the neural signature of anxiety, panic, and persistent hyperarousal. Posterior high-beta excess is associated with PTSD and complex trauma.
Left Frontal Alpha Asymmetry — The Depression Signature
Excess alpha (8–12 Hz) over the left frontal region relative to the right — frontal alpha asymmetry (FAA) — is the primary qEEG biomarker of depression. Because alpha is inversely related to activation, more left-frontal alpha means less left prefrontal cortex activity: lower approach motivation, reduced positive affect, impaired emotional regulation.
Waking Delta Excess — The TBI Signature
Delta (0.5–4 Hz) should not be prominent in a waking brain. When it is — particularly in frontal or temporal regions — it typically signals traumatic brain injury (TBI), post-concussion syndrome, or significant cognitive dysfunction. Waking delta excess is the clearest neurological footprint of a past head injury on a qEEG.
From Report to Neurofeedback Protocol
Your brainwave report is a roadmap, not just a description. Every statistically significant deviation becomes a training target: neurofeedback rewards the brain in real time for producing more of what is underactive and less of what is overactive — gradually training it toward the healthy patterns the normative database defines.
At Bhakti Brain Health Clinic in Edina, Minnesota, the qEEG assessment and full brainwave report review is the first step for every patient. Progress is tracked with repeat qEEG assessments through the training course — so the maps that initially showed overactivation or deficit can be compared directly to post-training brain activity. When the colours shift toward green, the brain’s regulation — and the patient’s symptoms — shift with them.
Frequently Asked Questions
What does a qEEG brainwave report show?
A qEEG brainwave report maps the amplitude and distribution of your brain’s electrical activity across six frequency bands at every electrode site, then compares those findings statistically to a normative database of healthy individuals your age. The result is a set of colour-coded brain maps and Z-scores showing precisely where your brain is overactive, underactive, or within normal range.
What do the colours on a brain map mean?
Green indicates activity within the healthy normal range. Red or orange indicates overactivation — excess of that frequency in that region. Blue indicates underactivation — deficit. The intensity of the colour reflects the statistical magnitude of the deviation, expressed as a Z-score.
What is a Z-score on a qEEG report?
A Z-score measures how many standard deviations your brain’s activity sits from the healthy mean for your age and gender. Scores between -2 and +2 are within the normal range. A score above +2 means overactivation in that region and frequency. Below -2 means underactivation. Z-scores make the qEEG analysis objective, quantified, and personally meaningful.
Can a brainwave report identify ADHD, anxiety, or depression?
A qEEG brainwave report does not independently diagnose conditions — clinical assessment is required for diagnosis. However, it clearly identifies the brainwave dysregulation patterns most closely associated with each condition: elevated frontal theta for ADHD, high-beta temporal excess for anxiety, and left frontal alpha asymmetry for depression. These objective findings personalise and focus the neurofeedback protocol.
Get Your Brainwave Report at Bhakti Brain Health Clinic — Edina, MN
Bhakti Brain Health Clinic is a specialist neurotherapy clinic in Edina, Minnesota, serving patients across the greater Minneapolis–Saint Paul area. Our qEEG brain mapping assessment produces a full personalised brainwave report — colour brain maps, Z-score analysis, and clinical interpretation — as the objective foundation of every drug-free neurofeedback protocol we design for ADHD, anxiety, depression, PTSD, TBI, OCD, and sleep disorders.
Our Neurotherapy Grant Program supports patients who need financial assistance. Your brainwave report is where data-driven brain health care begins.
Get Your Own Brainwave Report at BhaktiOur qEEG brain mapping assessment produces a personalised colour brain map with Z-score analysis and clinical interpretation — the objective foundation of every drug-free neurofeedback protocol at Bhakti Brain Health Clinic, Edina, MN. → Schedule Your Free Initial Consultation ← bhaktibrainhealthclinic.com • 888-783-BBHC (2242) • 7300 Metro Blvd #340, Edina, MN 55439 |
Your brainwave report is a window into your brain’s electrical patterns that no symptom checklist or standard EEG can provide. Reading it correctly — and acting on what it shows — is the first step toward personalised, targeted, drug-free brain health care.
