کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6027999 1580916 2014 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Greenwood frequency-position relationship in the primary auditory cortex in guinea pigs
ترجمه فارسی عنوان
رابطه موقعیت فرکانس گرینوود در قشر شنوایی اولیه در خوکچه های دریایی
کلمات کلیدی
بهترین فرکانس، فاصله کانونی، تصویربرداری نوری، قشر شنوایی اولیه، تونوتوپی،
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب شناختی
چکیده انگلیسی
Although orderly representation of sound frequency over space is a hallmark feature of the primary auditory cortex (A1), the quantitative relationship between sound frequency and cortical position is unclear. We examined this relationship in the guinea pig A1 by presenting a series of stimulus tones with a wide frequency range, and recording the evoked cortical responses using an optical imaging technique with high spatial resolution. We identified the cortical positions of three best-frequency indices for each tone: the onset response position, the peak amplitude position, and the maximum rise rate position of the response. We found a nonlinear log frequency-position relationship for each of the three indices, and the frequency-position relationship was always well described by a Greenwood equation, with correlation coefficients greater than 0.98. The cortical magnification factor, measured in octave/mm, was found to be a function of frequency, i.e. not a constant. Our results are novel in that they demonstrate a quantitative relationship between sound frequency and cortical position in the guinea pig A1, as described by the Greenwood equation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NeuroImage - Volume 89, 1 April 2014, Pages 181-191
نویسندگان
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