کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9436522 | 1615694 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Auditory evoked potentials from medulla and midbrain in the clawed frog, Xenopus laevis laevis
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
سیستم های حسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Auditory evoked potentials (AEPs) to clicks and tonal pulses were recorded from medulla and midbrain in Xenopus laevis laevis. They comprise three components: an initial peak (I) at 2.2-3Â ms latency, a fast series of peaks (F) at 5-15Â ms latency, and a slow negative wave (S) at 20-40Â ms latency. In medullary recordings, the initial peak was largest, whereas in midbrain recordings typically the two other components prevailed. For all components and animals, response threshold at 4Â clicks/s was approximately 69Â dB SPL. In response to tonal stimuli, AEP amplitudes were maximal at 1.3-2.0 and 3.5Â kHz. Raising the click rate to 100/s gradually reduced the amplitude of the I and the first F peaks, whereas later F peaks and the S wave virtually disappeared at 20-40Â clicks/s. On the other hand, extending the plateau duration of tonal stimuli from 4 to 10Â ms hardly affected the I and F peaks but doubled the S amplitude. This suggests two systems for stimulus processing, a fast system capable to follow clicks up to high repetition rates and a slow system with longer integration time.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hearing Research - Volume 204, Issues 1â2, June 2005, Pages 29-36
Journal: Hearing Research - Volume 204, Issues 1â2, June 2005, Pages 29-36
نویسندگان
Nikolay G. Bibikov, Andreas Elepfandt,