As noted earlier, training of the amplitude of specific EEG frequencies presently is the most common NF application. This often involves simultaneous training for increasing the amplitude of one frequency and decreasing the amplitude of another. That is, some protocols train for changing amplitude ratios between two frequencies, e.g., lowering the 0:b ratio. Within the general area of frequency amplitude training, there are two often independent groups of NF practitioners: (1) those who emphasize training to increase the amplitude of higher (b) frequencies (and, in some protocols, decrease lower frequencies) and (2) those who train increases in the amplitude of lower frequencies (a, 0). The first group, typified by those who treat attention deficit disorder or seek to develop "peak performance,'' is interested in developing higher levels of arousal in presumably underaroused (or at least not optimally aroused) cortical areas. This is based on the fact that higher levels of brain activation are reflected in higher concentrations of high-frequency EEG. The second group typically is interested in "quieting" an overactive central nervous system and/ or inducing an altered state of consciousness for therapeutic purposes. For example, training to increase the amplitude of the a frequency may be part of a relaxation training program, whereas the increasing 0 (or a-0) amplitude may be aimed at helping the client enter a state in which early childhood trauma may be reexperienced and resolved, with concomitant psychological reintegration.
Was this article helpful?