{'fraction_non_alphanumeric': 0.017241379310344827, 'fraction_numerical': 0.0, 'mean_word_length': 5.624161073825503, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
EEG in the Context of Audiovisual Stimulation

Audiovisual stimulation of the brain and EEG biofeedback has been studied for their possible applications to variety of conditions. One of the most fundamental principles of biofeedback is the necessity of accurate monitoring and feedback of the physiological processes of interest in order to control it. Here we present application of nonlinear measures and their comparison with spectral measures in detection of different brain states. A group of volunteers was involved in audiovisual stimulation training. EEG was recorded during their attempt for general resting. Following measures were tested: linear correlation, averaged mutual information, spectral edge frequency, relative power of alpha, beta, delta and theta band, spectral entropy, correlation dimension, and results of subjective assessment. Results from this study showed their changes in the course of the training. Nonlinear measures employed deserve further attention.