Schröger E, Tervaniemi M, Näätänen R
Institute of Psychology, Ludwig-Maximilians-Universität München, Germany.
Neurosci Lett. 1995 Dec 29;202(1-2):117-20. doi: 10.1016/0304-3940(95)12222-2.
The present study investigated the neural mechanisms of intensity coding by presenting human subjects repetitively with tone pairs consisting of two tones differing in intensity. The first tone was higher in sound pressure level than the second (70 versus 58 dB SPL). Infrequent order reversals of the two tones elicited the mismatch negativity (MMN), an event-related brain potential probe of preattentive auditory sensory memory. This finding indicates that the human auditory system automatically encodes information about the time course of intensity within tone patterns into neural representations.
本研究通过向人类受试者重复呈现由两个强度不同的音调组成的音调对，来探究强度编码的神经机制。第一个音调的声压级高于第二个音调（分别为70 dB SPL和58 dB SPL）。两个音调偶尔的顺序反转会引发失配负波（MMN），这是一种用于前注意听觉感觉记忆的事件相关脑电位指标。这一发现表明，人类听觉系统会自动将音调模式中强度随时间变化的信息编码为神经表征。
