EEG dipole source localisation of interictal spikes acquired during routine clinical video-EEG monitoring

Meckes-Ferber, Stefanie; Roten, Annie; Kilpatrick, Christine; O’Brien, Terence J.

doi:10.1016/j.clinph.2004.06.023

Cited by 16 publications

(4 citation statements)

References 20 publications

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“…High electrode densities (≥64 channels) and extensive spatial coverage, including inferior temporal electrodes, increase the precision of ESI (Kobayashi et al., 2003; Lantz et al., 2003a; Meckes‐Ferber et al., 2004; Sperli et al., 2006). Fast neurophysiologic propagation affects the localization and morphology of scalp IED (Alarcon et al., 1994; Fernandez Torre et al., 1999) and ESI is more accurate when applied to the IED rising phase rather than to its peak (Lantz et al., 2003b).…”

Section: Eeg Source Imaging (Esi)mentioning

confidence: 99%

The combination of EEG Source Imaging and EEG‐correlated functional MRI to map epileptic networks

et al. 2010

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SUMMARYFunctional electrophysiologic techniques such as electroencephalography (EEG) and magnetoencephalography (MEG) give insights into the dynamics of the networks involved in the generation of interictal and ictal epileptic activity and their interaction with physiologic brain activity. With recent advances in methodology and clinical validation, EEG source imaging (ESI) may now be used to map epileptic activity as well as evoked responses to external stimuli. By its ability to show hemodynamic changes time locked to epileptic activity in the whole brain, EEG-correlated functional magnetic resonance imaging (fMRI) (EEG-fMRI) is the natural counterpart of ESI, circumventing some of its limitations, the former adding data from the depths of the brain, and the latter temporal resolution. To better understand the potential and limitations of both techniques, this review starts with a description of the neurophysiologic mechanisms that give rise to the measured signals, followed by validation studies based on comparison with intracranial EEG and surgical outcome. We then discuss analysis strategies to combine both techniques by reviewing studies in epilepsy, current methodologic development, and future directions of this fast-developing field.

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Section: Eeg Source Imaging (Esi)mentioning

confidence: 99%

The combination of EEG Source Imaging and EEG‐correlated functional MRI to map epileptic networks

et al. 2010

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“…Increasing the number of electrodes from 19 to 29 in one study increased EEG spike localization accuracy from 36 to 93%. This, however, does not come as a surprise, because the extra electrodes covered the lower (temporal) part of the head and the endpoint was identification of the lobe of seizure onset, usually the temporal lobe [19]. In identifying a lobe, even with 21 electrodes, EEG can have an 85% concordance with MEG [43].…”

Section: Clinical Studies: Magnetoencephalography Versus Electroencepmentioning

confidence: 99%

Interictal electromagnetic source imaging in focal epilepsy: practices, results and recommendations

Leijten

Huiskamp²

2008

Current Opinion in Neurology

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“…Subtemporal electrodes have long been incorporated in the ESI of temporal spikes (Ebersole and Wade, 1990;Meckes-Ferber et al, 2004) and in the ESI of seizures (Kobayashi et al, 2000). They have been reported to significantly increase accuracy of temporal spike ESI (Ebersole, 1997) even with dense electrode arrays (Sperli et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

A Method for the Inclusion of Sphenoidal Electrodes in Realistic EEG Source Imaging

Hamaneh

Kaiboriboon

Dimitriu

et al. 2014

Journal of Clinical Neurophysiology

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Although EEG source imaging (ESI) has become more popular over the last few years, sphenoidal electrodes (SPE) have never been incorporated in ESI using realistic head models. This is in part because of the true locations of these electrodes are not exactly known. In this study, we demonstrate the feasibility of determining the true locations of SPE and incorporating this information into realistic ESI. The impact of including these electrodes in ESI in mesial temporal lobe epilepsy is also discussed. Seventeen patients were retrospectively selected for this study. To determine the positions of SPE in each case, two orthogonal x-rays (sagittal and coronal) of the SPE needle stilette were taken in the presence of previously digitized scalp electrodes. An in-house computer program was then used to find the locations of the tip of the needle stilette relative to the surface electrodes. These locations were then incorporated in a realistic head model based on the finite element method. EEG source imaging was then performed using averaged spikes for included patients suspected of having mesial temporal lobe epilepsy. Including SPE significantly shifted the ESI result even in the presence of subtemporal electrodes, resulting in an inferior and mesial displacement.

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EEG dipole source localisation of interictal spikes acquired during routine clinical video-EEG monitoring

Cited by 16 publications

References 20 publications

The combination of EEG Source Imaging and EEG‐correlated functional MRI to map epileptic networks

The combination of EEG Source Imaging and EEG‐correlated functional MRI to map epileptic networks

Interictal electromagnetic source imaging in focal epilepsy: practices, results and recommendations

A Method for the Inclusion of Sphenoidal Electrodes in Realistic EEG Source Imaging

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