Widmann Andreas, Kujala Teija, Tervaniemi Mari, Kujala Anu, Schröger Erich
Institut für Allgemeine Psychologie, University of Leipzig, Germany.
Psychophysiology. 2004 Sep;41(5):709-15. doi: 10.1111/j.1469-8986.2004.00208.x.
Expectations on forthcoming sounds can speed up responding to environmental changes and can, thus, be a basis for successful adaptation. The present study investigated event-related brain potential (ERP) effects in situations where particular sounds were predicted on the basis of preceding visual information. Subjects had to map scorelike visual symbols to corresponding sounds. The sounds could be either congruent or occasionally incongruent with the corresponding symbol. When the auditory stimulation was incongruent with the visual information, a brain response was elicited starting as early as about 100 ms from the onset of the auditory stimulus. It had a bilateral frontal distribution and a polarity inversion at the mastoids compatible with the assumption of sources in auditory cortex. These results suggest that the auditory system can establish a representation of an expected stimulus on the basis of visual symbolic information.
对即将到来的声音的预期可以加快对环境变化的反应速度，因此可以成为成功适应的基础。本研究调查了在根据先前视觉信息预测特定声音的情况下与事件相关的脑电位（ERP）效应。受试者必须将类似分数的视觉符号映射到相应的声音。声音可能与相应符号一致，也可能偶尔不一致。当听觉刺激与视觉信息不一致时，早在听觉刺激开始约100毫秒就会引发脑反应。它具有双侧额叶分布，并且在乳突处有极性反转，这与听觉皮层中存在源的假设相符。这些结果表明，听觉系统可以基于视觉符号信息建立预期刺激的表征。
