TY - JOUR
T1 - Focal magnetoencephalographic spikes in the superior temporal plane undetected by scalp EEG
AU - Iwasaki, Masaki
AU - Nakasato, Nobukazu
AU - Shamoto, Hiroshi
AU - Yoshimoto, Takashi
N1 - Funding Information:
This study was partly supported by Grant-in-Aid for the Development of Innovative Technology No. 12208 from the Ministry of Education, Culture, Sports, Science and Technology of Japan.
PY - 2003/3
Y1 - 2003/3
N2 - Temporal lobe spikes were detected by magnetoencephalography (MEG), but not by standard scalp electroencephalography (EEG), in a patient with intractable complex partial seizures. Simultaneous recording of scalp EEG and MEG revealed 2 different types of spike discharges: sporadic single spikes detected by both EEG and MEG which were localised diffusely in the right temporal lobe; and rhythmic MEG spike discharges that were not detected by scalp EEG, focally localised in the posterior part of the superior temporal plane. The tangential current orientation to the scalp may explain the different sensitivity of scalp EEG and MEG to rhythmic discharges. This study shows the unique sensitivity of MEG to epileptic activity in the superior temporal plane.
AB - Temporal lobe spikes were detected by magnetoencephalography (MEG), but not by standard scalp electroencephalography (EEG), in a patient with intractable complex partial seizures. Simultaneous recording of scalp EEG and MEG revealed 2 different types of spike discharges: sporadic single spikes detected by both EEG and MEG which were localised diffusely in the right temporal lobe; and rhythmic MEG spike discharges that were not detected by scalp EEG, focally localised in the posterior part of the superior temporal plane. The tangential current orientation to the scalp may explain the different sensitivity of scalp EEG and MEG to rhythmic discharges. This study shows the unique sensitivity of MEG to epileptic activity in the superior temporal plane.
KW - Electroencephalography
KW - Magnetoencephalography
KW - Spike
KW - Subclinical seizure
KW - Temporal lobe epilepsy
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U2 - 10.1016/S0967-5868(02)00342-9
DO - 10.1016/S0967-5868(02)00342-9
M3 - Article
C2 - 12637058
AN - SCOPUS:0037347407
SN - 0967-5868
VL - 10
SP - 236
EP - 238
JO - Journal of Clinical Neuroscience
JF - Journal of Clinical Neuroscience
IS - 2
ER -