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Updated: Jun 22, 2026

Time-dependent Increase in the Network Response to the Stimulation of Neuronal Cell Cultures on Micro-electrode Arrays
Published on: May 29, 2017
Delay-induced multiple stochastic resonances on scale-free neuronal networks
Qingyun Wang1, Matjaz Perc, Zhisheng Duan
1Department of Mechanics and Aerospace Engineering, State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing 100871, China.
Stochastic resonance in scale-free neuronal networks is enhanced by noise, with optimal pacemaker placement crucial. Time-delayed coupling can induce multiple resonances or abolish them, highlighting the importance of network dynamics.
Area of Science:
- Neuroscience
- Complex Systems
- Physics
Background:
- Scale-free neuronal networks exhibit complex dynamics.
- Stochastic resonance (SR) is a phenomenon where noise enhances signal detection.
- Pacemaker activity and coupling delays influence network behavior.
Purpose of the Study:
- Investigate the effects of periodic pacemaker activity and time-delayed coupling on stochastic resonance in scale-free neuronal networks.
- Determine the influence of pacemaker placement (high-degree vs. low-degree neurons) on SR.
- Analyze the impact of time-delayed coupling on SR and the emergence of multiple resonances.
Main Methods:
- Simulations of scale-free neuronal networks with periodic subthreshold pacemaker forcing.
- Analysis of stochastic resonance using correlation measures.
- Systematic variation of noise intensity, pacemaker location, and coupling delay.
Main Results:
- An intermediate noise intensity optimally assists pacemaker rhythm imposition across the network, demonstrating SR.
- SR decreases when all neurons are paced compared to single-neuron pacing.
- Finite delays can induce multiple SR peaks or abolish SR, depending on delay tuning.
Conclusions:
- Noise plays a crucial role in facilitating pacemaker rhythm synchronization in scale-free networks.
- Pacemaker placement and coupling delays are critical factors for optimizing SR.
- Fine-tuned delays and localized pacemakers are vital for robust SR in complex neuronal networks.
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