Synchronization of oscillatory activity in spatially-structured neural networks
The ubiquitous observation of neural rhythms has motivated numerous analyses of their origins and characteristics. Most studies have focused on the temporal aspect of the dynamics and have been performed for randomly connected networks. Spatial waves of oscillatory neural activities have however been recorded in several neural structures. Here, we consider oscillations in local networks of coupled excitatory and inhibitory neurons and analyze synchronization produced by longer range excitatory coupling. We show that phase gradients can spontaneously appear and discuss the relation with propagating waves of beta-activity previously reported in the motor cortex.
This work has been performed in collaboration with Anirudh Kulkarni and Jonas Ranft.