Winkler I, Tervaniemi M, Huotilainen M, Ilmoniemi R, Ahonen A, Salonen O, Standertskjöld-Nordenstam C G, Näätänen R
Department of Psychophysiology, Hungarian Academy of Sciences, Budapest.
Neuroreport. 1995 Nov 27;6(17):2317-20.
Magnetic brain responses to infrequent changes in the pitch of complex sounds were recorded. The composition of the test sounds required that pitch-deviant stimuli elicited the mismatch response only if perceived pitch was represented in auditory sensory memory. Results revealed that subjective features, such as pitch, are formed from objective stimulus parameters (i.e. the spectral contents of a sound) before storing acoustic information in memory. The origin of the magnetic response to pitch change showed that pitch deviation was detected in the auditory cortex. Pitch memory might also be located in the auditory cortex, as previous evidence suggests that storage for an auditory feature lies in the vicinity of the neuronal elements activated by deviations in that feature.
记录了大脑对复杂声音音高罕见变化的磁响应。测试声音的构成要求，只有当听觉感觉记忆中呈现了音高偏差刺激所引发的失配反应时，音高偏差刺激才能引发该反应。结果显示，诸如音高之类的主观特征是在将声学信息存储于记忆之前，由客观刺激参数（即声音的频谱内容）形成的。对音高变化的磁响应起源表明，在听觉皮层中检测到了音高偏差。音高记忆可能也位于听觉皮层，因为先前的证据表明，听觉特征的存储位于由该特征偏差激活的神经元元件附近。
