کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1547051 997627 2010 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Noise induced amplification of sub-threshold pulses in multi-thread excitable semiconductor 'neurons'
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Noise induced amplification of sub-threshold pulses in multi-thread excitable semiconductor 'neurons'
چکیده انگلیسی
We report on the transmission of electrical pulses through a semiconductor structure which emulates biological neurons. The 'neuron' emits bursts of electrical spikes whose coherence we study as a function of the amplitude and frequency of a sine wave stimulus and noise. Noise is found to enhance the transmission of pulses below the firing threshold of the neuron. We demonstrate stochastic resonance when the power of the output signal passes through a maximum at an optimum noise value. Under appropriate conditions, we observe coherence resonance and stochastic synchronization. Data are quantitatively explained by modelling the FitzHugh-Nagumo equations derived from the electrical equivalent circuit of the soma. We have therefore demonstrated a physically realistic neuron structure that provides first principles feedback on mathematical models and that is well suited to building arborescent networks of pulsing neurons.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 42, Issue 10, September 2010, Pages 2853-2856
نویسندگان
, , , , , ,