Emergence of target waves in neuronal networks due to diverse forcing currents

• 作 者: MA Jun WANG ChunNi YING HePing WU Ying CHU RunTong
• 机 构: Department of Physics,Lanzhou University of Technology,Department of Physics,Zhejiang University,Sch
• 出 处: Science China(Physics,Mechanics & Astronomy)
• 发表日期: 2013年06期
• 关键词: forcing currents periodical neuronal mutual perfect Hodgkin diverse occupy suppr

The electric activities of neurons could be changed when ion channel block occurs in the neurons.External forcing currents with diversity are imposed on the regular network of Hodgkin-Huxley(HH) neuron,and target waves are induced to occupy the network.The forcing current I1 is imposed on neurons in a local region with m 0 ×m 0 nodes in the network,neurons in other nodes are imposed with another forcing current I2.Target wave could be developed to occupy the network when the gradient forcing current(I1-I2) exceeds certain threshold,and the formation of target wave is independent of the selection of boundary condition.It is also found that the developed target wave can decrease the negative effect of ion channel block and suppress the spiral wave,and thus channel noise is also considered.The potential mechanism of formation of target wave could be that the gradient forcing current(I1-I2) generates quasi-periodical signal in local area,and the propagation of quasi-periodical signal induces target-like wave due to mutual coupling among neurons in the network.

The electric activities of neurons could be changed when ion channel block occurs in the neurons .External forcing currents with diversity are imposed on the regular network of Hodgkin-Huxley (HH) neuron, and target waves are induced to occupy the network.The forcing current I1 imposed on neurons in a local region with m 0 × m 0 nodes in the network, neurons in other nodes are imposed with another forcing current I2.Target wave could be developed to occupy the network when the gradient forcing current (I1-I2 ) exceeds certain threshold, and the formation of target wave is independent of the selection of boundary condition. It is also found that the developed target wave can decrease the negative effect of ion channel block and suppress the spiral wave, and thus channel noise is also considered. The potential mechanism of formation of target wave could be that gradient forcing current (I1-I2) generates quasi-periodical signal in local area, and the propagation of quasi-periodical signal indu ces target-like wave due to mutual coupling among neurons in the network.