Localization of XXXX foci.

@entity1 @entity410 @entity302
This chapter is devoted to the contribution of long-term EEG and behavioral monitoring to the localization of @entity302 foci. Combined EEG and video monitoring may clarify the clinical @entity410 pattern reported by history; it may confirm or invalidate its localizing significance. It may also reveal unsuspected multiple clinical @entity410 patterns which may or may not correspond to multiple areas of @entity410 onset. The localizing evidence derived from interictal EEG abnormality provides valuable additional diagnostic information, identifying a likely area of @entity410 onset. Automatic spike recognition may improve the quality of the information provided by interictal activity by providing otherwise unavailable quantitative information. The main application of EEG monitoring is for detecting the region of @entity410 onset. This is important for the identification of @entity410 type, the differentiation between @entity302 and @entity302 and the preoperative localization of @entity410 onset. Reliable localization in @entity1 with partial @entity410 depends upon demonstration of a precise focal or regional onset of the ictal EEG changes occurring prior to or simultaneously with clinical @entity410 manifestations. Use of intracranial electrodes is indicated when monitoring with extracranial electrodes has not provided unequivocal localization of @entity410 onset. Automatic @entity410 recognition and phase analysis may again increase the yield of monitoring in localizing epileptogenic foci.
