Transcranial direct current stimulation (tDCS) is a non-invasive neuro-modulation technique that uses weak currents sent through electrodes on the scalp to transiently alter characteristics of the brain. Targeting specific cortical areas researchers have employed tDCS to influence motor functioning,…
Transcranial magnetic stimulation (TMS) is a popular non-invasive brain stimulation technique, allowing researchers and clinicians alike to draw causal inference about structure-function relationships in the human brain. This powerful method actively interferes with local brain processing by depolarizing…
Objective - Transcranial direct current stimulation (tDCS) is a non-invasive neuro-modulation technique that delivers current through the scalp by a pair of patch electrodes (2-Patch). This study proposes a new multi-channel tDCS (mc-tDCS) optimization method, the distributed constrained maximum intensity…
New experimental and modeling parameters are introduced to investigate effects on combined electroencephalography (EEG) and magnetoencephalography (MEG) - EMEG source analysis and transcranial electric stimulation (TES) optimization of somatosensory evoked and epileptic activity. Simultaneous data are…
Modeling and experimental parameters influence the Electro‐ (EEG) and Magnetoencephalography (MEG) source analysis of the somatosensory P20/N20 component. In a sensitivity group study, we compare P20/N20 source analysis due to different stimulation type (Electric‐Wrist [EW], Braille‐Tactile [BT], or…
Magnetoencephalography (MEG) signals are influenced by skull defects. However, there is a lack of evidence of this influence during source reconstruction. Our objectives are to characterize errors in source reconstruction from MEG signals due to ignoring skull defects and to assess the ability of an…
We investigated two important means for improving source reconstruction in presurgical epilepsy diagnosis. The first investigation is about the optimal choice of the number of epileptic spikes in averaging to (1) sufficiently reduce the noise bias for an accurate determination of the center of gravity…
Lawrence, Kanada / San Francisco, Calif.: PLOS, 2015-03-11
Determining the centers of electrical activity in the human body and the connectivity between different centers of activity in the brain is an active area of research. To understand brain function and the nature of cardiovascular diseases requires sophisticated methods applicable to non-invasively measured…