Rosburg T, Haueisen J, Sauer H
Brain Topogr. 2002 Fall;15(1):37-41. doi: 10.1023/a:1019940506408.
The equivalent source of the neuromagnetic auditory evoked field (AEF) component N100m shifts systematically within its latency range. In the current study, possible effects of stimulus duration on this shift were analysed. 15 subjects were stimulated monaurally with tones of different duration (50, 100, 200 ms) and AEFs were recorded successively over both hemispheres. Dipoles were calculated in 5-ms-steps from 15 ms before to 15 ms after the N100m peak maximum. A dipole location shift within the N100m latency from posterior to anterior and from superior to inferior was observed. The shift in anterior-posterior direction was found to be larger in the right compared to the left hemisphere. Stimulus duration significantly affected the degree of dipole shift in this direction. It was found to be shorter the shorter the stimulus.
神经磁听觉诱发电场（AEF）成分N100m的等效源在其潜伏期范围内有系统性的移动。在本研究中，分析了刺激持续时间对这种移动的可能影响。15名受试者单耳接受不同持续时间（50、100、200毫秒）的纯音刺激，并在双侧半球连续记录AEF。从N100m峰值前15毫秒到峰值后15毫秒，以5毫秒为步长计算偶极子。观察到N100m潜伏期内偶极子位置从后向前、从上向下移动。发现右半球前后方向的移动比左半球更大。刺激持续时间显著影响该方向上偶极子移动的程度。发现刺激越短，偶极子移动越短。
