QUANTITATIVE EEG
QUANTITATIVE EEG (QEEG) Quantitative analysis of brain activity as a basis for precise therapy selection
qEEG is a research method that complements standard electroencephalography by adding a quantitative analysis of the brain’s electrical activity. Visual EEG assessment allows clinicians to detect clinically significant (epileptiform) changes, while qEEG transforms recorded data into objective numerical indicators and activity distribution maps.
This makes it possible not only to detect the presence of disorders, but also to understand how brain function is organized and what mechanisms underlie a child’s developmental difficulties. qEEG is used as a tool for therapy planning, enabling a transition from general recommendations to targeted interventions.
How It Works
During the examination, a standard EEG is recorded.
The recording is then processed using computer analysis, during which:
- quantitative indicators of different brain rhythms are calculated
- their distribution across brain regions is assessed
- proportions between different types of activity are analyzed
The obtained data are compared with age norms.
This allows identification of which brain systems function less efficiently and which are overloaded or imbalanced.
What Is Assessed
The analysis makes it possible to determine:
- level of cortical activation
- proportions between slow and fast rhythms
- efficiency of neuronal activity regulation
- function of areas related to speech, attention, and behavioral control
- overall organization of interactions between brain regions
The goal is to understand the functional architecture of the brain, not merely to detect abnormalities.
When the Examination Is Particularly Important
The test is used in children with:
- delayed speech development
- attention deficits and hyperactivity
- learning difficulties
- emotional instability
- autism spectrum disorders
- sensorimotor disorders
How the Examination Is Performed
A cap with electrodes is placed on the child’s head.The recording takes place in a calm environment.The child does not need to perform complex tasks — maintaining a relaxed state is sufficient.The examination is painless and well tolerated.
What qEEG Provides
The results allow:
- understanding the causes of a child’s difficulties
- identifying areas of functional deficit and overload
- defining priority directions for therapy
- monitoring changes during treatment
This enables a transition from general assessment to precise therapy planning.
Relation to Therapy
qEEG is not used in isolation but as a basis for selecting intervention methods.
Based on the obtained data:
- parameters of transcranial micropolarization (tDCS/TKMP) are selected
- EEG neurofeedback protocols are developed
- targets and areas for neuromodulation are defined
- the validity of bioacoustic correction (BAC) is assessed
- therapy sequence and priorities are established
Thus, therapy is based on the actual functional state of the brain rather than general schemes.
Why It Is Crucial
Without objective analysis, brain-related interventions are often empirical.
qEEG allows:
- reducing the risk of ineffective interventions
- avoiding excessive stimulation
- making therapy more precise and predictable
This is particularly important in children, where brain resources are limited and require careful management.
Safety
The method:
- is non-invasive
- does not directly affect the brain
- is based solely on recording electrical activity
- can be used in children of all ages
Essence of the Method
qEEG is a tool that allows understanding how a child’s brain functions and, on this basis, selecting the most effective therapeutic strategy, including TKMP, neurofeedback, and BAC.