Effects of colored noise on stochastic resonance in sensory neurons
Effects of colored noise on stochastic resonance in sensory neurons
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DOI：
10.1103/physrevlett.82.2402
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发表时间：
1999-03-15
影响因子：
8.6
通讯作者：
Collins, JJ
中科院分区：
文献类型：
--
作者：
Nozaki, D;Mar, DJ;Collins, JJ
噪声可以通过一种称为随机共振(SR)的机制来帮助神经元检测微弱信号。我们在实验上证明，在白噪声、1/f噪声或1/f(2)噪声的情况下，可以在大鼠感觉神经元中获得SR类型的效应。结果表明，对于低频输入噪声，最优噪声强度最小，而对于常规白噪声，输出信噪比最高。我们还表明，在某些情况下，1/f噪声可以比白噪声更好地增强神经元对弱信号的响应。我们提出了一种解释这些结果的理论，并讨论了1/f噪声的生物学意义。
Noise can assist neurons in the detection of weak signals via a mechanism known as stochastic resonance (SR). We demonstrate experimentally that SR-type effects can be obtained in rat sensory neurons with white noise, 1/f noise, or 1/f(2) noise. For low-frequency input noise, we show that the optimal noise intensity is the lowest and the output signal-to-noise ratio the highest for conventional white noise. We also show that under certain circumstances, 1/f noise can be better than white noise for enhancing the response of a neuron to a weak signal. We present a theory to account for these results and discuss the biological implications of 1/f noise.