کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6287260 | 1615577 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Human cortical sensitivity to interaural time difference in high-frequency sounds
ترجمه فارسی عنوان
حساسیت قشر انسانی به تفاوت زمان درون فضایی در صداهای فرکانس بالا
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کلمات کلیدی
JNDITDEOGERFMSOSPLLSOIPDILD - آتشISI - آی اس آیelectro-oculogram - الکتریک oculogramMEG - بهanalysis of variance - تحلیل واریانسANOVA - تحلیل واریانس Analysis of varianceInteraural time difference - تفاوت زمان تعاملیInteraural level difference - تفاوت سطح تعاملیInteraural phase difference - تفاوت فاز بیناییJust-noticeable difference - تفاوت قابل توجهevent-related field - زمینه مربوط به رویدادlateral superior olive - زیتون برتر جانبیmedial superior olive - زیتون عالیSound pressure level - سطح فشار صوتinter-stimulus interval - فاصله بین محرکmagnetoencephalography - مغناطیس مغزInferior colliculus - کولیکولوس پایین
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
سیستم های حسی
چکیده انگلیسی
Human sound source localization relies on various acoustical cues one of the most important being the interaural time difference (ITD). ITD is best detected in the fine structure of low-frequency sounds but it may also contribute to spatial hearing at higher frequencies if extracted from the sound envelope. The human brain mechanisms related to this envelope ITD cue remain unexplored. Here, we tested the sensitivity of the human auditory cortex to envelope ITD in magnetoencephalography (MEG) recordings. We found two types of sensitivity to envelope ITD. First, the amplitude of the auditory cortical N1m response was smaller for zero envelope ITD than for long envelope ITDs corresponding to the sound being in opposite phase in the two ears. Second, the N1m response amplitude showed ITD-specific adaptation for both fine-structure and for envelope ITD. The auditory cortical sensitivity was weaker for envelope ITD in high-frequency sounds than for fine-structure ITD in low-frequency sounds but occurred within a range of ITDs that are encountered in natural conditions. Finally, the participants were briefly tested for their behavioral ability to detect envelope ITD. Interestingly, we found a correlation between the behavioral performance and the neural sensitivity to envelope ITD. In conclusion, our findings show that the human auditory cortex is sensitive to ITD in the envelope of high-frequency sounds and this sensitivity may have behavioral relevance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hearing Research - Volume 323, May 2015, Pages 99-106
Journal: Hearing Research - Volume 323, May 2015, Pages 99-106
نویسندگان
Nelli H. Salminen, Alessandro Altoè, Marko Takanen, Olli Santala, Ville Pulkki,