Electromagnetic radiation modulates synchronization in cortical neurons of Macaque brain

摘要

We study dynamical synchronization in a model of a neural system representing 47 cortical regions of Macaque brain under the effect of an electromagnetic field. This system is constituted by local networks of densely interconnected excitatory and inhibitory neurons. Coupling between the local networks is introduced through sparsely distributed excitatory connectivity. Voltage- and ligand-gated ion channels determine the neural dynamics of the networks. The effect of electromagnetic field on the neural system is studied by modulating magnetic flux on the membrane potential using memristor coupling. With the application of electromagnetic field and the modulation of long-range synaptic coupling, the system easily makes transition to synchronization. It is found that the threshold for synchrony between coupled local networks is lowered by the applied electromagnetic field. Also, electromagnetic field causes the neural subsystems to make low amplitude oscillations with an approximate frequency of 130 Hz. This indicates that electromagnetic field gives rise to high-gamma activity in the cortical regions of the brain which increases selective attention. This may facilitate adaptive brain function by giving rise to a rich collection of dynamics and contribute to the origin of complex patterns observed in the EEG.