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Numbers represent electrode contacts of the standard subdural grid coverage. The tumor margins are displayed as light blue. Electrical stimulation of contacts 11 and 12 (dark blue) caused speech arrest in Broca's area. Electrical stimulation of contacts 23 and 41 (red) caused an electrographic seizure; contacts 1, 2 and 9 (light gray) were removed for better contour along the cortical surface.
