Alho K, Kujala T, Paavilainen P, Summala H, Näätänen R
Department of Psychology, University of Helsinki, Finland.
Electroencephalogr Clin Neurophysiol. 1993 Jun;86(6):418-27. doi: 10.1016/0013-4694(93)90137-k.
Auditory event-related potentials (ERPs) were recorded in early blind subjects and sighted controls when they attended to stimuli delivered to a designated ear under dichotic conditions. The scalp distribution of the processing negativity (PN), the endogenous negativity elicited by attended stimuli, was in the blind posterior to that in the sighted. This suggests that posterior brain areas normally involved in vision participate in auditory selective attention in the early blind. Furthermore, occasional higher-frequency tones in the to-be-ignored ear elicited a negativity (presumably the mismatch negativity; MMN) that had a posterior scalp distribution in the blind as compared to controls. This suggests that the posterior brain areas of the blind also participate in processing of auditory stimulus changes occurring outside the focus of attention.
在双耳分听条件下，当早期失明受试者和视力正常的对照组关注传递到指定耳朵的刺激时，记录了听觉事件相关电位（ERP）。加工负波（PN）是由被关注刺激引发的内源性负波，其头皮分布在失明者中比视力正常者更靠后。这表明，正常情况下参与视觉的后脑区域在早期失明者中参与了听觉选择性注意。此外，在被忽略耳朵中偶尔出现的高频音调会引发一种负波（可能是失配负波；MMN），与对照组相比，该负波在失明者中具有后脑头皮分布。这表明，失明者的后脑区域也参与了对注意力焦点之外发生的听觉刺激变化的处理。
