The neural dynamics model of motor cognition was studied by using stochastic phase resetting dynamics . The mutual interaction, phase coding and evolution of average number density with time were obtained for perception neuronal population, inter-neuronal population and motor neuronal population under coupling condition by numerical simulation. The response of neural network dynamics in both spontaneous and external stimuli was discussed. By use of numerical simulation, it is attested to (1) the hypothesis presented by W.J Freeman that the response of cortex dynamics can not be the encoded information from external stimulation; (2) the neural coding possesses property of the rhythm coding in the system of serial neural networks; (3) neural inhibition possesses important action in modulation of nerve center system.