Comparison of dense array EEG with simultaneous intracranial EEG for Interictal spike detection and localization

Yamazaki, Madoka; Tucker, Don M.; Fujimoto, Ayataka; Yamazoe, Tomohiro; Okanishi, Tohru; Yokota, Takuya; Enoki, Hideo; Yamamoto, Takamichi

doi:10.1016/j.eplepsyres.2011.09.007

Cited by 70 publications

(54 citation statements)

References 25 publications

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“…This is much higher than that of 45% obtained with conventional EEG performed during waking phase with sleep deprivation [12]. Our findings are consistent with previous publications, suggesting that video EEG is superior to standard PSG in detecting some specific forms of EDs [13].…”

Section: Association Between Ed Seizure Types and Sleep Phasessupporting

confidence: 93%

Association Between Epileptiform Discharges and the Sleep Cycle in 200 Epileptic Patients

Wang

et al. 2012

International Journal of Neuroscience

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Section: Association Between Ed Seizure Types and Sleep Phasessupporting

confidence: 93%

Association Between Epileptiform Discharges and the Sleep Cycle in 200 Epileptic Patients

Wang

et al. 2012

International Journal of Neuroscience

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“…This has been shown by recording interictal discharges simultaneously from scalp and foramen ovale electrode recordings of the mesial temporal structures (48, 49) as well as in cognitive tasks involving the hippocampus studied with scalp and invasive EEG (50, 51). Recently, simultaneous high-density scalp EEG and intracranial EEG reports have supported these findings (52). …”

Section: Electric Source Imagingmentioning

confidence: 86%

“…Integrating these studies with simultaneous scalp and intracranial EEG (52) as well as simultaneous intracranial EEG and fMRI (179, 180) will help address some important issues in the field, such as the ability of ESI to detect mesial temporal activity and important aspects of the neuro-vascular coupling. This is a crucial topic in order to understand mechanisms of EEG-fMRI as it has been reported that electro-physiological and fMRI maps have intrinsic spatial differences (221).…”

Section: Multimodal Imaging Co-registration and Perspectivesmentioning

confidence: 99%

The Role of Functional Neuroimaging in Pre-Surgical Epilepsy Evaluation

et al. 2014

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The prevalence of epilepsy is about 1% and one-third of cases do not respond to medical treatment. In an eligible subset of patients with drug-resistant epilepsy, surgical resection of the epileptogenic zone is the only treatment that can possibly cure the disease. Non-invasive techniques provide information for the localization of the epileptic focus in the majority of cases, whereas in others invasive procedures are required. In the last years, non-invasive neuroimaging techniques, such as simultaneous recording of functional magnetic resonance imaging and electroencephalogram (EEG-fMRI), positron emission tomography (PET), single photon emission computed tomography (SPECT), electric and magnetic source imaging (MSI, ESI), spectroscopy (MRS), have proved their usefulness in defining the epileptic focus. The combination of these functional techniques can yield complementary information and their concordance is crucial for guiding clinical decision, namely the planning of invasive EEG recordings or respective surgery. The aim of this review is to present these non-invasive neuroimaging techniques, their potential combination, and their role in the pre-surgical evaluation of patients with pharmaco-resistant epilepsy.

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“…Simultaneous measurements with dense array scalp EEG and subdural strips also showed some scalp IEDs associated with cortical activity in 2 to 4 contacts, with a mixture of 5 and 10 mm intercontact distance (Yamamoto, 2012).…”

Section: Discussionmentioning

confidence: 99%

Extent of cortical generators visible on the scalp: Effect of a subdural grid

et al. 2014

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1 Both authors contributed equally. Highlights• Subdural grids attenuate the scalp potential of generators located under them.• Attenuation of subdural grids and amplification of skull holes do not cancel each other.• Minimum cortical extents of visible scalp activity could be smaller than previously reported. AbstractThe effect of the non-conducting substrate of a subdural grid on the scalp electric potential distribution is studied through simulations. Using a detailed head model and the Finite Element Method we show that the governing physics equations predict an important attenuation in the scalp potential for generators located under the grid, and an amplification for generators located under holes in the skull filled with conductive media. These effects are spatially localized and do not cancel each other. A 4 x 8 cm grid can produce attenuations of 2 to 3 times, and an 8 x 8 cm grid attenuation of up to 8 times. As a consequence, when there is no subdural grid, generators of 4 to 8 cm 2 produce scalp potentials of the same maximum amplitude as generators of 10 to 20 cm 2 under the center of a subdural grid. This means that the minimum cortical extents necessary to produce visible scalp activity determined from simultaneous scalp and subdural recordings can be overestimations.

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Comparison of dense array EEG with simultaneous intracranial EEG for Interictal spike detection and localization

Cited by 70 publications

References 25 publications

Association Between Epileptiform Discharges and the Sleep Cycle in 200 Epileptic Patients

Association Between Epileptiform Discharges and the Sleep Cycle in 200 Epileptic Patients

The Role of Functional Neuroimaging in Pre-Surgical Epilepsy Evaluation

Extent of cortical generators visible on the scalp: Effect of a subdural grid

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