Functional network complexity reflects diverse reward contexts in macaque premotor cortex

The behavior in the stop signal task-probing inhibitory control-is strongly modulated by the reward context, and this modulation is reflected in neural activity recorded from single sites of the dorsal premotor cortex (PMd) of macaque monkeys [1]. However, how the neural dynamics of motor inhibition is modulated at the network level in different motivational contexts is still unexplored. To tackle the issue, we characterized the synchronization patterns between spiking activities (SUA) recorded using a multielectrode (Utah array, 96 electrodes) and applied graph theory methods to describe and quantify the complexity and heterogeneity of the network structure at different scales when movement is planned or successfully canceled after the presentation of a Stop signal.