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Temporal and Spatial Characteristics of Intracerebral Seizure Propagation: Predictive Value in Surgery for Temporal Lobe Epilepsy
Author(s) -
Adam Claude,
SaintHilaire JeanMarc,
Richer Frangois
Publication year - 1994
Publication title -
epilepsia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.687
H-Index - 191
eISSN - 1528-1167
pISSN - 0013-9580
DOI - 10.1111/j.1528-1157.1994.tb02556.x
Subject(s) - epilepsy , temporal lobe , ictal , epilepsy surgery , frontal lobe , medicine , psychology , anesthesia , surgery , neuroscience
Summary: We examined the prognostic value of spatial and temporal characteristics of intracerebral propagation of seizures during temporal lobe epilepsy (TLE) surgery. Seven TLE patients resistant to standard anterotemporal lobectomy who had no known causes of resistance [e.g., extratemporal (ET), lesions, multifocal epilepsy] were matched with 7 seizure‐free patients and 7 others who were almost seizure‐free after operation. Intracerebral ictal propagation pathways were not different in the three groups. Propagation was multidirectional, most frequently to the frontal lobes and sometimes to the contra‐lateral temporal lobe (CTL). ET propagation delays were significantly shorter in resistant patients than in markedly improved patients. The resistant group also had more frequent propagation delays <1·0 s, but propagation times >1·0 s were equally likely in all groups. The extent of ET propagation and frequency of focal onsets were not different among the groups. Results suggest that very short propagation times predict reduced efficacy of operation, and that long propagation times are not related to surgical success.