کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6287678 | 1615626 | 2011 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The dominance of inhibition in the inferior colliculus
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کلمات کلیدی
ICCSTRFIPSPDNLLLSOMSOPSPDCNEPSP - epspilateral superior olive - زیتون برتر جانبیmedial superior olive - زیتون عالیFrequency modulation - مدولاسیون فرکانسspectrotemporal receptive field - میدان پذیرش اسپکترومترالmillivolt - میلیوولتCentral Nucleus of the Inferior Colliculus - هسته مرکزی کولیکولوس پایینdorsal nucleus of the lateral lemniscus - هسته پشتی لنسیسک جانبیdorsal cochlear nucleus - هسته کچلی پشتیexcitatory post-synaptic potential - پتانسیل پس از سیناپتی هیجان انگیزpost-synaptic potential - پتانسیل پس از سیناپسیinhibitory post-synaptic potential - پتانسیل پس از سیناپسی مهارکننده
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
سیستم های حسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Almost all of the processing that occurs in the various lower auditory nuclei converges upon a common target in the central nucleus of the inferior colliculus (ICc) thus making the ICc the nexus of the auditory system. A variety of new response properties are formed in the ICc through the interactions among the excitatory and inhibitory inputs that converge upon it. Here we review studies that illustrate the dominant role inhibition plays in the ICc. We begin by reviewing studies of tuning curves and show how inhibition shapes the variety of tuning curves in the ICc through sideband inhibition. We then show how inhibition shapes selective response properties for complex signals, focusing on selectivity for the sweep direction of frequency modulations (FM). In the final section we consider results from in vivo whole-cell recordings that show how parameters of the incoming excitation and inhibition interact to shape directional selectivity. We show that post-synaptic potentials (PSPs) evoked by different signals can be similar but evoke markedly different spike-counts. In these cases, spike threshold acts as a non-linear amplifier that converts small differences in PSPs into large differences in spike output. Such differences between the inputs to a cell compared to the outputs from the same cell suggest that highly selective discharge properties can be created by only minor adjustments in the synaptic strengths evoked by one or both signals. These findings also suggest that plasticity of response features may be achieved with far less modifications in circuitry than previously supposed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hearing Research - Volume 274, Issues 1â2, April 2011, Pages 27-39
Journal: Hearing Research - Volume 274, Issues 1â2, April 2011, Pages 27-39
نویسندگان
George D. Pollak, Ruili Xie, Joshua X. Gittelman, Sari Andoni, Na Li,