Synchronous Oscillations Influenced By Synaptic Dynamics In Visual Cortical Column Model

The state of synchronizing oscillations in the cortex are related to the dynamics characteristics of synapses, and the precise dynamics of synapses maybe varying because the number of receptors with different dynamics is uncertain. In order to analysis the effect of synapses dynamics on the synchronization oscillations in the cortex, a cortical column model is presented based on the anatomy data of turtle's visual cortex. Compared with the regular feed-forward network, this model could spontaneously produce synchronizing oscillations. The results shows that, when the fast-changed receptor is dominant in excitatory synapses, the oscillation's synchronism decline but frequency increase, and the slow-changed receptor in inhibitory synapses has the similar effect. Moreover, a proper ration of two kinds of receptor could maximum the efficiency of information transmission. These findings are beneficial for us to understand the intrinsic mechanisms of synchronizing oscillations in brain.