Abstract: Method and apparatus for determining the state of entrainment between biological systems which exhibit oscillatory behavior such as heart rhythms, respiration, blood pressure waves and low frequency brain waves based on a determination of heart rate variability (HRV) and an evaluation of the power spectrum thereof. Entrainment reflects a harmonious balance between the two branches of the autonomic nervous system within the body. This internal state of heightened physiological efficiency enhances health and promotes optimal performance. According to one embodiment a method is used to determine the entrainment level based on an entrainment parameter related to HRV. The method first determines the power distribution spectrum (PSD) and then calculates an entrainment parameter (EP), which is a measure of the power distribution in the HRV spectrum.

Abstract: Systems and methods for electrophysiological detection and measurement of intuition are disclosed. In one embodiment, one or more electrophysiological properties of one or more individuals are monitored and used as an indication of a future event. In one embodiment, the electrophysiological property may include heart rate variability, brain wave activity, respiration pattern, skin conductance level, etc. In another embodiment, a signal averaging technique is used to generate a waveform that may be used as an indicator of future events.

Abstract: Systems and methods for facilitating physiological coherence using respiratory training are disclosed. In one embodiment, an optimal respiratory cycle and/or RSA pattern is determined. A subject is then trained to adhere to this optimal respiratory level using one or more breath indicators. In another embodiment, the timing sequence of the breath indicators is optimized for a given subject's reaction time and/or atypical breathing events. In yet another embodiment, a subject's respiratory rhythms are used to detect their emotional state and corresponding feedback provided.

Abstract: Method and apparatus for determining the state of entrainment between biological systems which exhibit oscillatory behavior such as heart rhythms, respiration, blood pressure waves and low frequency brain waves based on a determination of heart rate variability (HRV). Entrainment reflects a harmonious balance between the two branches of the autonomic nervous system within the body. This internal state of heightened physiological efficiency enhances health and promotes optimal performance. According to one embodiment a method is used to determine the entrainment level based on an entrainment parameter related to HRV. The method first determines the power distribution spectrum (PSD) and then calculates an entrainment parameter (EP), which is a measure of the power distribution in the HRV spectrum. High EP values occur when this power is concentrated within a relatively narrow range of frequencies, and lower values when the power is distributed over a broader range of frequencies.