منابع مشابه
Wavelet analysis of epileptic spikes.
Interictal spikes and sharp waves in human EEG are characteristic signatures of epilepsy. These potentials originate as a result of synchronous pathological discharge of many neurons. The reliable detection of such potentials has been the long standing problem in EEG analysis, especially after long-term monitoring became common in investigation of epileptic patients. The traditional definition ...
متن کاملConcordance of Epileptic Networks Associated with Epileptic Spikes Measured by High-Density EEG and Fast fMRI
OBJECTIVE The present study aims to investigate whether a newly developed fast fMRI called MREG (magnetic resonance encephalography) measures metabolic changes related to interictal epileptic discharges (IED). For this purpose BOLD changes are correlated with the IED distribution and variability. METHODS Patients with focal epilepsy underwent EEG-MREG using a 64 channel cap. IED voltage maps ...
متن کاملIs it time to replace epileptic spikes with fast ripples?
Is it time to replace epileptic spikes with fast ripples? In well over a century of performing epilepsy surgery, only 60%–65% of patients are, on average, seizure-free postoperatively. 1 Despite multiple advances in neuroimaging and electrophysiologic techniques for localizing the epileptogenic zone and determining its boundaries, defining the exact amount of neuronal tissue required to resect ...
متن کاملParameters for clinical evaluation of interictal epileptic spikes
1) The single current dipole moment [strength of the dipole vector in nAm (Q)] 2) The correlation coefficient [the degree of association between the actual measured magnetic field data and the estimated forward solution data (R)] 3) The goodness of fit [the measure of how well the measured magnetic field agrees with the estimated field from an assumed dipole (GoF)] 4) The root mean square (RMS)...
متن کاملApplication of a hemodynamic model to epileptic spikes
Despite the interest in simultaneous EEG-fMRI studies of epileptic spikes, the link between epileptic discharges and their corresponding hemodynamic responses is poorly understood. We applied two biophysical models in order to investigate the mechanisms underlying the neurovascular coupling in epilepsy: a metabolic hemodynamic model, and a neural mass model that simulates epileptic discharges. ...
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ژورنال
عنوان ژورنال: Epilepsia
سال: 2002
ISSN: 0013-9580,1528-1167
DOI: 10.1046/j.1528-1157.43.s.5.7.x