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Zhengzhen Zhang,Shaowen Zeng,Wenyan Tang,Jinlin Hu,Rongfeng Wang,Liming Zhou,Shangyou Zeng 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.61 No.1
In this paper, we study the intrinsic coherence resonance of neurons due to ion channel noise under an external stimulus. We find that the external stimulus cannot only increase the spiking coherence of neurons but also increase the optimal area of neuronal membrane for maximal spiking coherence. The optimal membrane area is approximately 3 μm<sup>2</sup> without the external stimulus. However, when the external stimulus is 6 μA/cm<sup>2</sup>, the optimal membrane area is approximately 400 μm<sup>2</sup>. Because 400 μm<sup>2</sup> is the area of a common neuronal soma, our finding has a realistic meaning. Under the external stimulus, common neurons have an optimized conformation to guarantee maximal spiking coherence and the best sub-threshold signal encoding.