Jacobsen T, Schröger E
Institut für Allgemeine Psychologie, Universität Leipzig, Germany.
Psychophysiology. 2001 Jul;38(4):723-7.
The brain's responsiveness to changes in sound frequency has been demonstrated by an overwhelming number of studies. Change detection occurs unintentionally and automatically. It is generally assumed that this brain response, the so-called mismatch negativity (MMN) of the event-related brain potential or evoked magnetic field, is based on the outcome of a memory-comparison mechanism rather than being due to a differential state of refractoriness of tonotopically organized cortical neurons. To the authors' knowledge, however, there is no entirely compelling evidence for this belief. An experimental protocol controlling for refractoriness effects was developed and a true memory-comparison-based brain response to pitch change was demonstrated.
大量研究已证实大脑对声音频率变化具有反应能力。变化检测是无意识且自动发生的。一般认为，这种大脑反应，即事件相关脑电位或诱发磁场中的所谓失匹配负波（MMN），是基于记忆比较机制的结果，而非由于声调组织的皮层神经元的不应期差异状态。然而，据作者所知，尚无完全令人信服的证据支持这一观点。我们开发了一种控制不应期效应的实验方案，并证明了基于真正记忆比较的大脑对音高变化的反应。
