Abstract:
:Eleven patients had seizures with unilateral temporal lobe onset recorded with simultaneous bilateral medial temporal depth electrodes and neocortical (subdural) electrodes at least on the side of seizure onset. Of a total of 55 seizures, four had simultaneous onset in neocortex and hippocampus, and 51 had onset in unilateral hippocampus. None originated solely in temporal neocortex. Three reproducible patterns of seizure spread from hippocampus were defined in which seizures spread initially to ipsilateral neocortex (32 seizures), spread first to contralateral hippocampus (13 seizures), or spread simultaneously to ipsilateral neocortex and contralateral hippocampus. Although the region of hippocampus in which seizures arose was constant, patterns of spread sometimes varied in the same patient. When contralateral neocortical involvement occurred, it was after or with contralateral hippocampus but never before. These results suggest the existence of an operational hippocampal commissure in humans.
journal_name
Epilepsiajournal_title
Epilepsiaauthors
Spencer SS,Williamson PD,Spencer DD,Mattson RHdoi
10.1111/j.1528-1157.1987.tb03676.xsubject
Has Abstractpub_date
1987-09-01 00:00:00pages
479-89issue
5eissn
0013-9580issn
1528-1167journal_volume
28pub_type
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