Winkler I, Czigler I
Institute for Psychology, Hungarian Academy of Sciences, Budapest.
Neuroreport. 1998 Dec 1;9(17):3809-13. doi: 10.1097/00001756-199812010-00008.
Electric brain responses were measured to infrequent tones that broke the frequency alternation of two tones, deviated in duration or violated both regularities (alternation and constant duration). Mismatch negativity (MMN) was elicited by both simple deviants with the duration-related MMN peaking approximately 130 ms later than the alternation-related MMN. The double deviant elicited two successive MMNs. Thus violation of each regularity elicited a separate MMN, whereas previous studies showed that multiple temporally separate deviations from a single repetitive standard elicit one MMN only. These results suggest that the primary function of the MMN-generating process is more closely related to maintaining the representation of auditory regularities than to deviance detection per se.
测量了对不常见音调的脑电反应，这些音调打破了两个音调的频率交替、时长有偏差或同时违反了两种规律（交替和固定时长）。简单偏差刺激均诱发了失匹配负波（MMN），与时长相关的MMN峰值比与交替相关的MMN大约晚130毫秒。双重偏差刺激诱发了两个连续的MMN。因此，每种规律的违反都会引发一个单独的MMN，而先前的研究表明，与单一重复标准在时间上分开的多个偏差只会引发一个MMN。这些结果表明，MMN产生过程的主要功能与维持听觉规律的表征更密切相关，而不是与偏差检测本身相关。
