Multidimensional filtering of the electrocorticogram (ECoG) for epileptic focus localization

The rationale of a method for the detection and localization of focal epileptic activity from multichannel ECoG recordings is introduced. The proposed method, the spatiotemporal Laplacian, emphasizes the need to consider both the spatial and the temporal attributes of focal epileptic activity. In its current implementation the method discriminates the events of interest by means of combined measures of spatial and temporal sharpness, yielding a two-dimensional representation that facilitates the localization of the focus. Some preliminary offline results are presented.<>