title: Magnetoencephalographic evaluation of children and adolescents with intractable epilepsy.
abstract: Magnetoencephalographic (MEG) discharges were recorded with multichannel superconducting quantum interference device (SQUID) gradiometers in 13 young candidates for epilepsy surgery. The sources of epileptic activity were related to generators of somatosensory and auditory evoked cortical responses and projected on magnetic resonance imaging (MRI) scans. Seven subjects had restricted or regional MEG foci, located in the frontoopercular (1), sensorimotor (3), perisylvian (1), mesiotemporal (1), or temporooccipital cortex (1). The MEG foci in the 3 patients who underwent operation agreed with the intracranial findings. Findings in the other patients emphasize the need to collect further data to define the ultimate role of MEG in preoperative evaluation of epilepsy.
authors.affiliation: Low Temperature Laboratory, Helsinki University of Technology, Espoo, Finland.
authors.forename: R
authors.initials: R
authors.lastname: Paetau
authors.forename: M
authors.initials: M
authors.lastname: Hämäläinen
authors.forename: R
authors.initials: R
authors.lastname: Hari
authors.forename: M
authors.initials: M
authors.lastname: Kajola
authors.forename: J
authors.initials: J
authors.lastname: Karhu
authors.forename: T A
authors.initials: TA
authors.lastname: Larsen
authors.forename: E
authors.initials: E
authors.lastname: Lindahl
authors.forename: O
authors.initials: O
authors.lastname: Salonen
mesh_terms: D000293:Adolescent; D000328:Adult; D001303:Auditory Cortex / Q000503:physiopathology; D002540:Cerebral Cortex / Q000503:physiopathology*; D002648:Child; D004569:Electroencephalography; D004828:Epilepsies, Partial / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery; D004827:Epilepsy / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery; D005072:Evoked Potentials, Auditory; D005073:Evoked Potentials, Somatosensory; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D015225:Magnetoencephalography; D008297:Male; D013003:Somatosensory Cortex / Q000503:physiopathology