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Granger connectivity matrices in a single session. Granger connectivity was evaluated separately during joystick trials (A) and during BCI trials (B). Each red or blue cell indicates significant excitatory or inhibitory connectivity from a trigger unit (abscissa) to a target unit (ordinate). White cells indicate no significant connectivity between the pair. Black lines separate groups of BCI units and non-BCI units from different cortical areas. Data from Monkey Q, assignment iii.
