The QEEG uses special software to process recorded EEG activity and compares it to a normative database to give brain maps. It is a clinical tool to evaluate brain function. QEEG is a valuable tool not only to predict symptoms and determine the most suitable medications (pharmaco EEG), but also to track changes in brain function over time as a result of interventions.
QEEGs are used in research all over the world to study disorders like ADHD, autism spectrum, depression, bipolar disorder and PTSD among others. QEEG reveals a ‘level of specificity and sensitivity that is comparable to sonograms, blood tests, MRIs and other diagnostic measures used in clinical practice (Thatcher, R.; Moore, R.; John, R.; Duffy, P.; et al, 1999)
On the other hand, event-related potentials (ERPs) are the manifestation of information flow within the brain. It is considered the gold standard to detect subtle deviations from average measures and allows us to see markers for specific brain disorders. Together, QEEG and ERP provide us with a deep understanding of brain functioning which can be used to make informed treatment decisions.