Potential of a Wavelet Synchronization Method for Assessing the Long-Latency Components of Auditory Evoked Potentials in Healthy Humans

The traditional characteristics of long-latency event-related potentials, which are established indictors of higher nervous activity, include the amplitude-time parameters of the components, the topography of power levels, and identification of the locations of equivalent dipole sources. Evaluation of the synchronization of event-related activity is difficult because of the short duration of the process. Wavelet analysis overcomes the disadvantages of traditional Fourier analysis and allows calculation of these characteristics, particularly phase synchronization. The present report is methodological in nature. It proposes an approach to the component analysis of wavelet synchronization of averaged auditory event-related potentials in healthy humans in states with different levels of concentration of attention. The differences seen in the spatial organization of signals seen on listening to sounds and counting them indicate the potential of this methodological approach.