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<p>This paper reports wavelet analysis of the EEG during cyclic motion of sound stimuli. EEG recordings were made during passive listening to stimuli with cyclic changes in interaural time differences (ITD) designed to model binaural beats. Changes in the spectral power (ERSP, event-related spectral perturbation) and phase coherence (ITC, inter-trial phase coherence) of the oscillatory activity underlying motion-onset responses (MOR) and omitted-stimulus responses (OSR) were analyzed. In responses to motion onset, the highest ERSP and ITC values of θ oscillations were recorded with the stimulus located centrally, while the values of these indicators decreased at deviations of 45° and 90° from this position. The sensitivity of ERSP and ITC to the position of the starting point was most marked in the leads of the right hemisphere. Responses to the end of movement did not depend on the spatial position of the stimulus and were associated with the phase synchronization (ITC) of θ oscillations, which continued after the movement stopped.</p>

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Theta-Band Oscillatory Responses to the Onset and Offset of Cyclic Sound Motion

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • L. B. Shestopalova,
  • E. A. Petropavlovskaia,
  • P. I. Letyagin,
  • D. A. Salikova

摘要

This paper reports wavelet analysis of the EEG during cyclic motion of sound stimuli. EEG recordings were made during passive listening to stimuli with cyclic changes in interaural time differences (ITD) designed to model binaural beats. Changes in the spectral power (ERSP, event-related spectral perturbation) and phase coherence (ITC, inter-trial phase coherence) of the oscillatory activity underlying motion-onset responses (MOR) and omitted-stimulus responses (OSR) were analyzed. In responses to motion onset, the highest ERSP and ITC values of θ oscillations were recorded with the stimulus located centrally, while the values of these indicators decreased at deviations of 45° and 90° from this position. The sensitivity of ERSP and ITC to the position of the starting point was most marked in the leads of the right hemisphere. Responses to the end of movement did not depend on the spatial position of the stimulus and were associated with the phase synchronization (ITC) of θ oscillations, which continued after the movement stopped.