What is "Brain Mapping"?
- "Brain Mapping" is a technique used to display brainwave activity to provide a "snap shot" of how a person's brain is functioning.
- Brain mapping was originally developed to help psychiatrists to diagnose psychiatric disorders and prescribe medications.
- Neurofeedback practitioners utilize brain mapping to guide neurofeedback training.
- "Quantitative EEG" (QEEG) is a procedure that mathematically analyzes brainwave activity (EEG) recorded from a patient and turns it into a numerical form that allows for statistical analyses. EEG data that has been quantified to become QEEG data can be put into tables to display how much of a given type of brainwave is present and allows it to be displayed in a "brain map" format.
- Normative EEG is the comparison of quantified EEG (QEEG) data to a normative database.
- A normative database contains the quantitatively analyzed EEG (QEEG) data of many individuals in a given age range that are considered to be normal for their age. Comparing a client's EEG to the normative database allows a clinician or researcher to evaluate if there are ways the client's brain function differs from "normal" and if these differences correlate to the client's symptoms.
- The ways in which a client's EEG differs from the normal database is usually related to the symptoms the client is experiencing.
- Brain Map deviations can relate to the amount of brainwave activity (usually measured as magnitude or power), the location of brainwave activity (based on the 10-20 system of electrode placement or by voxels on LORETA analysis), and the timing or connections represented by brainwave activity (usually measured as coherence and phase), or a combination of these variables.
- Brain Maps provide a template for developing individualized neurofeedback training protocols. Using neurofeedback training, the brain map measures that deviate from normal and correlate to the client's symptoms can be trained toward normal to reduce symptom severity and improve functioning.
Brain Map Examples