脳磁界聴性定常応答の位相同期の刺激強度依存性(生体磁気・医療応用)

概要

論文の詳細を見る
Magnetoencephalography (MEG) was recorded to detect the 40 Hz component in auditory steady-state responses (ASSRs) to stimuli (optimized chirp sounds) regularly repeated 40 times/s. The phase of 40 Hz component in ASSRs was synchronized to the repeated chirps. To obtain information on its mechanism, we used a differential-equation model for phase synchronization of ASSRs. The differential equation was numerically solved by the Runge-Kutta Method to obtain simulated results. The behavior of phase coherence of 40 Hz component in ASSRs obtained from the experimental results was compared with that shown by the simulated results and the simulated result predicted its experimental result to a satisfactory degree. In addition, the parameter representing the external force by stimulus in the model was found to be significantly influenced by the stimulus intensity. These results suggest that the model is validity.
社団法人日本磁気学会の論文
2007-05-01