Spatially congruent visual motion modulates activity of the primary auditory cortex
Spatially congruent visual motion modulates activity of the primary auditory cortex
复制标题
空间一致的视觉运动调节初级听觉皮层的活动
DOI：
10.1007/s00221-009-1830-5
复制
发表时间：
2009
影响因子：
2
通讯作者：
K. Mathiak
中科院分区：
文献类型：
--
作者：
M. Zvyagintsev;A. Nikolaev;H. Thönnessen;O. Sachs;J. Dammers;K. Mathiak
我们用脑磁图研究了从静态到移动视听刺激的大脑反应。空间一致的听觉和视觉刺激在同一方向上移动，而不一致的刺激在相反的方向上移动。使用偶极子模型，我们发现，静态到移动的过渡引起了双侧初级听觉皮层的神经反应。反应开始约100 ms后，从一个负分量（mvN 1）的运动开始，并持续在整个间隔的刺激运动。mvN 1成分与经典的静态声听觉N1反应相似，但振幅较小，潜伏期较晚。初级听觉皮层中mvN 1和N1偶极子的坐标也相似。对运动刺激的听觉反应的幅度似乎对视听运动的空间一致性很敏感;它在不一致条件下比一致条件下大。这表明运动视觉刺激调节初级听觉皮层的早期感觉活动。这种早期视听整合可以是运动处理所特有的。
We investigated the brain responses to the transitions from the static to moving audiovisual stimuli using magnetoencephalography. The spatially congruent auditory and visual stimuli moved in the same direction whereas the incongruent stimuli moved in the opposite directions. Using dipole modeling we found that the static-to-moving transitions evoked a neural response in the primary auditory cortex bilaterally. The response started about 100 ms after the motion onset from a negative component (mvN1) and lasted during the entire interval of the stimulus motion. The mvN1 component was similar to the classical auditory N1 response to the static sound, but had smaller amplitude and later latency. The coordinates of the mvN1 and N1 dipoles in the primary auditory cortex were also similar. The amplitude of the auditory response to the moving stimuli appears to be sensitive to spatial congruency of the audiovisual motion; it was larger in the incongruent than congruent condition. This is evidence that the moving visual stimuli modulate the early sensory activity in the primary auditory cortex. Such early audiovisual integration may be specific for motion processing.