Magnetoencephalographic Responses in Relation to the Factors Extracted from Autocorrelation and Interaural Cross-Correlation Functions
Auditory evoked magnetic fields (AEFs) in relation to the factors extracted from autocorrelation function (ACF) and interaural cross-correlation function (IACF) were examined by magnetoencephalography (MEG). First, the effects of the peak amplitude of the ACF, φ1, on AEFs were examined. The strength of the pitch corresponded well to φ1. The amplitude of the N1m,which was found above the left and right temporal lobes around 100ms after the stimulus onset, increased with increasing φ1. The results suggest that stronger pitch sounds lead to an increase in the N1m amplitude. Then, the effects of IACC and τIACC on AEFs were examined. Human lateralization performance deteriorated with decreasing IACC. When the IACC was 0. 95, the N1m amplitudes increased with increasing τIACC. However, the effect of τIACC on the N1m amplitudes was not significant when the IACC was 0.5. The results suggest that the lateralization performance is reflected in N1m amplitudes.
magnetoencephalography autocorrelation function cross-correlation function pitch strength lateralization
添田喜治 中川诚司
Institute for Human Science and Biomedical Engineering,National Institute of Advanced Industrial Science and Technology,1-8-31 Midorigaoka,Ikeda,Osaka 563-8577,Japan
国际会议
The 3rd International Symposium on Temporal Design(第三届时间性设计国际研讨会)
广州
英文
80-83
2007-11-02（万方平台首次上网日期，不代表论文的发表时间）