Weak electric fields detectability in a noisy neural network.
We investigate the detectability of weak electric field in a noisy neural network based on Izhikevich neuron model systematically. The neural network is composed of excitatory and inhibitory neurons with similar ratio as that in the mammalian neocortex, and the axonal conduction delays between neurons are also considered. It is found that the noise intensity can modulate the detectability of weak electric field. Stochastic resonance (SR) phenomenon induced by white noise is observed when the weak electric field is added to the network. It is interesting that SR almost disappeared when the connections between neurons are cancelled, suggesting the amplification effects of the neural coupling on the synchronization of neuronal spiking. Furthermore, the network parameters, such as the connection probability, the synaptic coupling strength, the scale of neuron population and the neuron heterogeneity, can also affect the detectability of the weak electric field. Finally, the model sensitivity is studied in detail, and results show that the neural network model has an optimal region for the detectability of weak electric field signal.
Key Laboratory of Cognition and Personality (Ministry of Education) and School of Psychology, Southwest University, Chongqing, China.
Jia
J
Zhao
School of Electrical Engineering and Automation, Tianjin University, Tianjin, China.
Bin
B
Deng
Tianjin Key Laboratory of Information Sensing and Inteligent Control, Tianjin University of Technology and Education, Tianjin, China.
Yingmei
Y
Qin
School of Electrical Engineering and Automation, Tianjin University, Tianjin, China.
Cong
C
Men
School of Electrical Engineering and Automation, Tianjin University, Tianjin, China.
Jiang
J
Wang
School of Electrical Engineering and Automation, Tianjin University, Tianjin, China.
Xile
X
Wei
School of Electrical Engineering and Automation, Tianjin University, Tianjin, China.
Jianbing
J
Sun
Detectability; Izhikevich neuron model; Stochastic resonance; Weak electric field