Mismatch negativity evoked by stationary and moving auditory images of different azimuthal positions

被引：20

作者：

Altman, JA ^{[1
]}

Vaitulevich, SP ^{[1
]}

Shestopalova, LB ^{[1
]}

Varfolomeev, AL ^{[1
]}

机构：

[1] Russian Acad Sci, Pavlov Inst Physiol, St Petersburg 199034, Russia

来源：

NEUROSCIENCE LETTERS | 2005年 / 384卷 / 03期

关键词：

mismatch negativity; event-related potentials; auditory spatial processing; dichotic stimulation; interaural time delay;

D O I：

10.1016/j.neulet.2005.05.002

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

The present study has been designed to evaluate the preattentive detection of the location changes for stationary and moving sound sources. Auditory event-related potentials to the click trains simulating stationary and moving fused auditory images were recorded from healthy subjects using an oddball paradigm. The spatial characteristics of stimuli were created by introducing constant or variable interaural time delay (ITD) into the click trains. Repetitive standard auditory images (0 or 800 mu s ITD, p = 0.9) were interspersed by infrequent deviants (p = 0.1) of three types: stationary and moving to or from standards. The deviants moving to standards elicited similar mismatch negativities (MMNs) as compared to the stationary ones. The deviants moving from standards evoked the lowest and latest MMNs depending on standard location. Results suggest that preattentive ITD discrimination is essentially dependent on the pattern of ITD changes at the moment of the deviant onset. (c) 2005 Elsevier Ireland Ltd. All rights reserved.

引用

页码：330 / 335

页数：6

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