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Comparison of Electroencephalographic Dipoles of Interictal Spikes from Prolonged Scalp Video- Electroencephalography and Magnetoencephalographic Dipoles from Short-Term Recording in Children With Extratemporal Lobe Epilepsy

Bloorview Epilepsy Research Program, Toronto, ON, 713643{at}ican.net, Department of Paediatrics, The Hospital for Sick Children and the University of Toronto, Toronto, ON

Hiroshi Otsubo, MD

Bloorview Epilepsy Research Program, Toronto, ON, Department of Paediatrics, The Hospital for Sick Children and the University of Toronto, Toronto, ON

Rohit Sharma, RET

Department of Paediatrics, The Hospital for Sick Children and the University of Toronto, Toronto, ON

Amrita Hunjan, RET

Department of Paediatrics, The Hospital for Sick Children and the University of Toronto, Toronto, ON

James T. Rutka, MD, PhD

Department of Surgery, The Hospital for Sick Children and the University of Toronto, Toronto, ON

Sylvester H. Chuang, MD

Department of Diagnostic Imaging, The Hospital for Sick Children and the University of Toronto, Toronto, ON

Ken'ichi Kamijo

Fundamental Research Laboratories, NEC Corporation, Tsukuba, Japan

Toshimasa Yamazaki, PhD

Fundamental Research Laboratories, NEC Corporation, Tsukuba, Japan

Patti Quint, RT

Magnetic Source Imaging Center, Scripps Clinic, La Jolla, CA

Lacey Kurelowech, RT

Magnetic Source Imaging Center, Scripps Clinic, La Jolla, CA

David F. Sobel, MD

Magnetic Source Imaging Center, Scripps Clinic, La Jolla, CA

Maung H. Aung, MD

Magnetic Source Imaging Center, Scripps Clinic, La Jolla, CA

O. Carter Snead, MD

Bloorview Epilepsy Research Program, Toronto, ON, Department of Paediatrics, The Hospital for Sick Children and the University of Toronto, Toronto, ON

We retrospectively compared electroencephalographic (EEG) dipoles of interictal spikes from prolonged video-EEG monitoring with magnetoencephalographic dipoles from short-term recording in four children with extratemporal lobe epilepsy. We analyzed both sets of dipoles using individual interictal spikes and single moving dipole modeling and evaluated the profiles of spike appearance, dipole position, and orientation in EEG and magnetoencephalography. We obtained more than 100 magnetoencephalographic spikes in two patients who manifested frequent interictal EEG spikes throughout both day and night but fewer than 40 magnetoencephalographic spikes in two patients who had interictal EEG spikes mainly during sleep. The dipole positions of EEG and magnetoencephalography were in close proximity and included in the surgical resection area. Most of the dipoles between EEG and magnetoencephalography were oriented perpendicularly. A combination of EEG dipole analysis from prolonged video-EEG monitoring and magnetoencephalographic dipole analysis provides complementary information for presurgical evaluation in children with intractable extratemporal lobe epilepsy. (J Child Neurol 2001;16:661-667).

Journal of Child Neurology, Vol. 16, No. 9, 661-667 (2001)
DOI: 10.1177/088307380101600907


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				A. Ochi, H. Otsubo, K. Iida, M. Oishi, I. Elliott, S. K. Weiss, T. Kutomi, T. Nakayama, R. Sharma, S. H. Chuang, et al. Identifying the Primary Epileptogenic Hemisphere from Electroencephalographic (EEG) and Magnetoencephalographic Dipole Lateralizations in Children With Intractable Epilepsy J Child Neurol, November 1, 2005; 20(11): 885 - 892. [Abstract] [PDF]