The brain has a memory, i.e. a unique ability to memorize and reproduce information. Memory mechanisms consist of perception, memorization, storage and subsequent reproduction of information.Based on numerous studies, only the neurophysiological mechanisms of perception, memorization and storage of information in the brain are disclosed, which include neurochemical and molecular processes. At the same time, the key mechanisms for extracting information from memory are still completely unknown. The problem is that the extraction of information from memory occurs in the subjective, mental sphere of brain activity, which was not available for study by existing neurophysiological methods.In recent years, progressive wavelet transforms based electroencephalogram (EEG) methods have been developed. Using the mathematical wavelet transform based electroencephalogram (EEG) method, we established the fundamental possibility of objective recording of the mental activity of the human brain, which opened the prospect of revealing the mechanisms for extracting information from memory.The overall goal of this study is to develop a fundamentally new information technology to identify mechanisms of memory reproduction in the mental activity of the brain by means of the wavelet transform based electroencephalogram (EEG). To solve this problem, an experimental model and software that allow testing the extraction of information from memory in humans have been developed [1][2][3][4][5][6].