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Project Details :
Project Title : Behavioral and temporal dynamics of the
fronto-parietal grasping network
Abstract : The dynamics of single neuron functional networks is only coarsely understood, especially their relationship to our cognitive and behavioral abilities. We recorded data from the macaque fronto-parietal network during a delayed grasping task. Dynamic functional connectivity between single units and local field potentials was calculated using a rate independent measure of spike-field coherence called pairwise phase consistency. Strong functional connections were present in beta and low frequency bands with beta being more dominant during fixation and memory epochs and low frequency during movement.
Neurons synchronizing with most of the network and contributing maximally to function were present in both frequencies. Interestingly, we found that the functional connections formed by beta hubs were more consistent over time and conditions than other functional connections. A low dimensional space was enough to explain the dynamic functional network connectivity, yet, within it conditions could be well discriminated. We speculate that beta hubs form a functional backbone rewiring the network dependent on required behavior.