Is there pre-attentive memory-based comparison of pitch?
Is there pre-attentive memory-based comparison of pitch?
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DOI：
10.1111/1469-8986.3840723
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发表时间：
2001-07-01
期刊：
影响因子：
3.7
通讯作者：
Schröger, E
中科院分区：
文献类型：
--
作者：
Jacobsen, T;Schröger, E
大量研究已经证明了大脑对声音频率变化的反应能力。更改检测会在无意中自动发生。通常认为，这种大脑反应，即事件相关脑电位或诱发磁场的所谓失配负性(MMN)，是基于记忆比较机制的结果，而不是由于紧张性组织的皮质神经元的不稳定状态造成的。然而，据作者所知，并没有完全令人信服的证据支持这一观点。开发了一种控制不稳定效应的实验方案，并展示了基于真实记忆比较的大脑对音调变化的反应。
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.