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Diverse response dynamics in brain is a reflection of the brains complex network connectivity.In order to understand the brain network, it is crucial to understand the brain dynamics.We chose Macaque primary visual cortex (V1) to study the involvement and interaction of different networks within V1.Our result reveals a variety of response properties of gamma (20-60 Hz) activity, including stochastic dynamics, laminar distributions and stimulus dependence.A unified model, which explains the response properties of gamma-band activity, implies the generation of gamma band activity and important roles of recurrent and feedback connections in primary visual cortex.