Soeta Yoshiharu, Nakagawa Seiji
Institute for Human Science and Biomedical Engineering, National Institute of Advanced Industrial Science and Technology, Midorigaoka, Ikeda, Osaka, Japan.
Neuroreport. 2009 Apr 22;20(6):548-52. doi: 10.1097/WNR.0b013e32832a6f15.
The aim of this study was to determine whether the amplitude and/or latency of the N1m deflection of auditory-evoked magnetic fields are influenced by the level and frequency of sound. The results indicated that the amplitude of the N1m increased with sound level. The growth in amplitude with increasing sound level was almost constant with low frequencies (250-1000 Hz); however, this growth decreased with high frequencies (>2000 Hz). The behavior of the amplitude may reflect a difference in the increase in the activation of the peripheral and/or central auditory systems.
本研究的目的是确定听觉诱发磁场N1m偏转的幅度和/或潜伏期是否受声音强度和频率的影响。结果表明，N1m的幅度随声音强度增加。在低频（250 - 1000赫兹）时，幅度随声音强度增加的增长几乎是恒定的；然而，在高频（>2000赫兹）时，这种增长会下降。幅度的这种表现可能反映了外周和/或中枢听觉系统激活增加的差异。
