QEEG Brain Mapping: What It Is, What It Reveals, and Why It Matters

What is a QEEG?

A quantitative EEG, or QEEG, is a detailed assessment of your brain's electrical activity. A cap fitted with sensors is placed on your scalp, recording the electrical signals produced by your brain at 19 or more sites simultaneously — while you sit quietly with eyes open, then eyes closed.

The raw data is then processed by specialized software that compares your brain's patterns against a normative database of thousands of same-age individuals. The result is a color-coded brain map showing precisely where your activity is excessive, deficient, or dysregulated relative to a healthy norm.

What can a QEEG reveal?

A QEEG can identify patterns associated with ADHD, anxiety, depression, PTSD, sleep disorders, TBI, and age-related cognitive decline — often with striking precision. For aging adults, it can show early signs of slowing or disconnection in regions responsible for memory and executive function, before those changes become clinically obvious.

It can also reveal strengths — areas of the brain that are particularly well-regulated — which guides us in building on what's already working.

Why it's the essential first step

Training the brain without a QEEG is like prescribing glasses without an eye exam. Every brain is unique, and the dysregulation patterns that produce similar-sounding symptoms can look very different from one person to the next.

Two people with anxiety, for example, might show completely opposite brainwave patterns — one with excess high-frequency activity, the other with insufficient alpha. Training both with the same protocol would help one and potentially worsen the other. The QEEG prevents this by making your protocol specific to your brain, not your diagnosis.