Displaying electrocorticographic findings on gyral anatomy

Towle, Vernon L.; Cohen, Steven B.; Alperin, Noam; Hoffmann, Kenneth R.; Cogen, Philip H.; Milton, John; Grzesczcuk, Robert; Pelizzari, Charles; Syed, Ibrahim B.; Spire, Jean-Paul

doi:10.1016/0013-4694(95)98474-m

Cited by 28 publications

(17 citation statements)

References 38 publications

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“…Numerous experiments in recent years have also shown task-related alpha modulations in subdural surface grids (Arroyo et al 1993;Toro et al 1994;Towle et al 1995;Crone et al 1998;Ohara et al 2000;Crone et al 2001;Brunner et al 2005;Dalal et al 2008;Blakely et al 2009;Edwards et al 2009;Swann et al 2009;Fukuda et al 2010), including centimeter-scale coherence (Shen et al 1999;Aoki et al 2001;Brunner et al 2005). Tremblay et al (2004) reported decreases of alpha band power over frontal and motor cortex not only with finger movements but also with observations of finger movements.…”

Section: Intracranial Eeg and Cortical Rhythmsmentioning

confidence: 90%

Spanning the rich spectrum of the human brain: slow waves to gamma and beyond

et al. 2011

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Section: Intracranial Eeg and Cortical Rhythmsmentioning

confidence: 90%

Spanning the rich spectrum of the human brain: slow waves to gamma and beyond

et al. 2011

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“…The estimated cortical potentials were compared with the SEP data directly recorded from the epicortex during the openskull surgery in the same subject. The estimated CP maps show much more localized spatial pattern than the SP maps recorded prior to the operation at comparable latency after the right median nerve stimulation, and are consistent with the direct CP recordings [4][5].…”

Section: Discussionsupporting

confidence: 70%

An experimental study on BEM-based cortical imaging of human SEP activities

Zhang

Towle²,

Sasaki³

et al.

2001 Conference Proceedings of the 23rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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“…Furthermore, the cortical potential distribution can be experimentally measured using ECoG grids (Le & Gevins, 1993;Gevins et al, 1994;Towle et al, 1995;Lantz et al, 1997;He et al, 2002;Tao et al, 2005). The dramatic improvement of spatial resolution achieved in the previous studies is promising and indicates that CPI may play an important role in lateralization and localization of epileptogenic foci in presurgical evaluation.…”

Section: Introductionmentioning

confidence: 98%

A cortical potential imaging study from simultaneous extra- and intracranial electrical recordings by means of the finite element method

et al. 2006

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In the present study, we have validated the cortical potential imaging (CPI) technique for estimating cortical potentials from scalp EEG using simultaneously recorded electrocorticogram (ECoG) in the presence of strong local inhomogeneity, i.e. Silastic ECoG grid(s). The finite element method (FEM) was used to model the realistic post-operative head volume conductor, which includes the scalp, skull, cerebrospinal fluid (CSF) and brain, as well as the Silastic ECoG grid(s) implanted during the surgical evaluation in epilepsy patients, from the co-registered magnetic resonance (MR) and computer tomography (CT) images. A series of computer simulations were conducted to evaluate the present FEM-based CPI technique, and to assess the effect of the Silastic ECoG grid on the scalp EEG forward solutions. The present simulation results show that the Silastic ECoG grid has substantial influence on the scalp potential forward solution due to the distortion of current pathways in the presence of the extremely low conductivity materials. On the other hand, its influence on the estimated cortical potential distribution is much less than that on the scalp potential distribution. With appropriate numerical modeling and inverse estimation techniques, we have demonstrated the feasibility of estimating the cortical potentials from the scalp EEG with the implanted Silastic ECoG gird(s), in both computer simulations and in human experimentation. In an epilepsy patient undergoing surgical evaluation, the cortical potentials were reconstructed from the simultaneously recorded scalp EEG, in which main features of spatial patterns during interictal spike were preserved and over 0.75 correlation coefficient value was obtained between the recorded and estimated cortical potentials. The FEM-based CPI technique provides a means of connecting the simultaneous recorded ECoG and the scalp EEG, and promises to become an effective tool to evaluate and validate CPI techniques using clinic data.

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Displaying electrocorticographic findings on gyral anatomy

Cited by 28 publications

References 38 publications

Spanning the rich spectrum of the human brain: slow waves to gamma and beyond

Spanning the rich spectrum of the human brain: slow waves to gamma and beyond

An experimental study on BEM-based cortical imaging of human SEP activities

A cortical potential imaging study from simultaneous extra- and intracranial electrical recordings by means of the finite element method

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