Jerk-locked back averaging and dipole source localization of magnetoencephalographic transients in a patient with epilepsia partialis continua. 1997

H Shigeto, and S Tobimatsu, and T Morioka, and T Yamamoto, and T Kobayashi, and M Kato
Department of Clinical Neurophysiology, Faculty of Medicine, Kyushu University, Fukuoka, Japan.

In order to localize the generator site of epileptiform discharges, we applied the techniques of jerk-locked back averaging (JBA) of magnetoencephalographic (MEG) activities and dipole source localization in a patient with epilepsia partialis continua (EPC), who showed continuous, focal myoclonic jerks in the right arm. The myoclonic discharges in the right thenar muscle were used as a trigger pulse. JBA revealed consistent EEG and MEG transients that coincided consistently and constantly preceded the myoclonic jerks. The estimated dipoles of MEG were localized in a restricted area in the left precentral area, which closely correlated with the area of epileptic discharges recorded in electrocorticography. Therefore, JBA of MEG is considered to be a useful non-invasive method for localizing the epileptogenic area in EPC.

UI MeSH Term Description Entries
D008279 Magnetic Resonance Imaging Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques. Chemical Shift Imaging,MR Tomography,MRI Scans,MRI, Functional,Magnetic Resonance Image,Magnetic Resonance Imaging, Functional,Magnetization Transfer Contrast Imaging,NMR Imaging,NMR Tomography,Tomography, NMR,Tomography, Proton Spin,fMRI,Functional Magnetic Resonance Imaging,Imaging, Chemical Shift,Proton Spin Tomography,Spin Echo Imaging,Steady-State Free Precession MRI,Tomography, MR,Zeugmatography,Chemical Shift Imagings,Echo Imaging, Spin,Echo Imagings, Spin,Functional MRI,Functional MRIs,Image, Magnetic Resonance,Imaging, Magnetic Resonance,Imaging, NMR,Imaging, Spin Echo,Imagings, Chemical Shift,Imagings, Spin Echo,MRI Scan,MRIs, Functional,Magnetic Resonance Images,Resonance Image, Magnetic,Scan, MRI,Scans, MRI,Shift Imaging, Chemical,Shift Imagings, Chemical,Spin Echo Imagings,Steady State Free Precession MRI
D008297 Male Males
D002540 Cerebral Cortex The thin layer of GRAY MATTER on the surface of the CEREBRAL HEMISPHERES that develops from the TELENCEPHALON and folds into gyri and sulci. It reaches its highest development in humans and is responsible for intellectual faculties and higher mental functions. Allocortex,Archipallium,Cortex Cerebri,Cortical Plate,Paleocortex,Periallocortex,Allocortices,Archipalliums,Cerebral Cortices,Cortex Cerebrus,Cortex, Cerebral,Cortical Plates,Paleocortices,Periallocortices,Plate, Cortical
D004562 Electrocardiography Recording of the moment-to-moment electromotive forces of the HEART as projected onto various sites on the body's surface, delineated as a scalar function of time. The recording is monitored by a tracing on slow moving chart paper or by observing it on a cardioscope, which is a CATHODE RAY TUBE DISPLAY. 12-Lead ECG,12-Lead EKG,12-Lead Electrocardiography,Cardiography,ECG,EKG,Electrocardiogram,Electrocardiograph,12 Lead ECG,12 Lead EKG,12 Lead Electrocardiography,12-Lead ECGs,12-Lead EKGs,12-Lead Electrocardiographies,Cardiographies,ECG, 12-Lead,EKG, 12-Lead,Electrocardiograms,Electrocardiographies, 12-Lead,Electrocardiographs,Electrocardiography, 12-Lead
D004569 Electroencephalography Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain. EEG,Electroencephalogram,Electroencephalograms
D004576 Electromyography Recording of the changes in electric potential of muscle by means of surface or needle electrodes. Electromyogram,Surface Electromyography,Electromyograms,Electromyographies,Electromyographies, Surface,Electromyography, Surface,Surface Electromyographies
D004828 Epilepsies, Partial Conditions characterized by recurrent paroxysmal neuronal discharges which arise from a focal region of the brain. Partial seizures are divided into simple and complex, depending on whether consciousness is unaltered (simple partial seizure) or disturbed (complex partial seizure). Both types may feature a wide variety of motor, sensory, and autonomic symptoms. Partial seizures may be classified by associated clinical features or anatomic location of the seizure focus. A secondary generalized seizure refers to a partial seizure that spreads to involve the brain diffusely. (From Adams et al., Principles of Neurology, 6th ed, pp317) Abdominal Epilepsy,Digestive Epilepsy,Epilepsy, Focal,Epilepsy, Simple Partial,Focal Seizure Disorder,Gelastic Epilepsy,Partial Epilepsy,Partial Seizure Disorder,Seizure Disorder, Partial,Simple Partial Seizures,Amygdalo-Hippocampal Epilepsy,Benign Focal Epilepsy, Childhood,Benign Occipital Epilepsy,Benign Occipital Epilepsy, Childhood,Childhood Benign Focal Epilepsy,Childhood Benign Occipital Epilepsy,Epilepsy, Benign Occipital,Epilepsy, Localization-Related,Epilepsy, Partial,Occipital Lobe Epilepsy,Panayiotopoulos Syndrome,Partial Seizures, Simple, Consciousness Preserved,Rhinencephalic Epilepsy,Seizure Disorder, Focal,Subclinical Seizure,Uncinate Seizures,Abdominal Epilepsies,Amygdalo-Hippocampal Epilepsies,Benign Occipital Epilepsies,Digestive Epilepsies,Disorders, Focal Seizure,Disorders, Partial Seizure,Epilepsies, Abdominal,Epilepsies, Amygdalo-Hippocampal,Epilepsies, Benign Occipital,Epilepsies, Digestive,Epilepsies, Focal,Epilepsies, Gelastic,Epilepsies, Localization-Related,Epilepsies, Occipital Lobe,Epilepsies, Rhinencephalic,Epilepsies, Simple Partial,Epilepsy, Abdominal,Focal Epilepsies,Focal Epilepsy,Focal Seizure Disorders,Gelastic Epilepsies,Lobe Epilepsy, Occipital,Localization-Related Epilepsies,Localization-Related Epilepsy,Occipital Epilepsies, Benign,Occipital Epilepsy, Benign,Occipital Lobe Epilepsies,Partial Epilepsies,Partial Epilepsies, Simple,Partial Seizure Disorders,Partial Seizures, Simple,Rhinencephalic Epilepsies,Seizure Disorders, Focal,Seizure Disorders, Partial,Seizure, Subclinical,Seizure, Uncinate,Seizures, Simple Partial,Seizures, Subclinical,Seizures, Uncinate,Simple Partial Epilepsies,Subclinical Seizures,Uncinate Seizure
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000368 Aged A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available. Elderly
D015225 Magnetoencephalography The measurement of magnetic fields over the head generated by electric currents in the brain. As in any electrical conductor, electric fields in the brain are accompanied by orthogonal magnetic fields. The measurement of these fields provides information about the localization of brain activity which is complementary to that provided by ELECTROENCEPHALOGRAPHY. Magnetoencephalography may be used alone or together with electroencephalography, for measurement of spontaneous or evoked activity, and for research or clinical purposes. Magnetoencephalogram,Magnetoencephalograms

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