Quantitative electroencephalography (qEEG) is a type of brain scan that measures electrical activity in the brain. Some synonyms for this term include brain mapping, neurofeedback, and EEG biofeedback. While each term may have slight differences in the methodology or techniques used, they all essentially refer to the same process of analyzing brain waves to gain insights into a person's mental state or to diagnose brain-related conditions. Other related terms include EEG analysis, brainwave analysis, and neuroimaging. Regardless of the exact terminology used, these techniques have the potential to provide valuable information for researchers, healthcare professionals, and individuals seeking to improve their cognitive function or mental well-being.