Presurgical three-dimensional magnetic source imaging of the somatosensory cortex in a patient with a peri-Rolandic lesion: technical note.
We report a case in which three-dimensional (3-D) magnetic source imaging, using the combined techniques of magnetoencephalography and 3-D magnetic resonance imaging, was employed to localize precisely a structural lesion in the precentral gyrus. The lesion was primarily a hematoma located in the right frontal lobe and was associated with a cryptic arteriovenous malformation that had produced repeated seizures with progressive left hemiparesis. 3-D magnetic source imaging mapped the entire somatosensory homunculus and localized the hematoma in the precentral gyrus. Both this relationship and the deduced localization were confirmed by a cortical recording of somatosensory evoked potentials at the time of surgery. 3-D magnetic source imaging proved to be useful in localizing cortical lesions precisely and in determining preoperatively the best form of treatment for the peri-Rolandic lesions.
Morioka
T
T
Department of Neurosurgery, Neurological Institute, Fukuoka, Japan.
Yamamoto
T
T
Katsuta
T
T
Fujii
K
K
Fukui
M
M
D000328:Adult; D001931:Brain Mapping / Q000295:instrumentation*; D002543:Cerebral Hemorrhage / Q000473:pathology / Q000503:physiopathology* / Q000601:surgery; D003196:Computer Graphics; D004558:Electric Stimulation; D005073:Evoked Potentials, Somatosensory / Q000502:physiology*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D008297:Male; D008475:Median Nerve / Q000503:physiopathology; D009044:Motor Cortex / Q000473:pathology / Q000503:physiopathology* / Q000601:surgery; D011930:Reaction Time / Q000502:physiology; D013003:Somatosensory Cortex / Q000473:pathology / Q000503:physiopathology* / Q000601:surgery