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- W2061034794 abstract "To investigate the spatial distribution of the magnitude and direction of the current density in the human head during transcranial direct current stimulation (tDCS). The current density distribution was calculated using a numerical method to implement a standard spherical head model into which current was injected by means of large electrodes. The model was positioned in ‘MNI space’ to facilitate the interpretation of spatial coordinates. The magnitude and direction of the current density vector are illustrated in selected brain slices for four different electrode montages. Approximately half of the current injected during tDCS is shunted through the scalp, depending on electrode dimension and position. Using stimulating currents of 2.0 mA, the magnitude of the current density in relevant regions of the brain is of the order of 0.1 A/m2, corresponding to an electric field of 0.22 V/m. Calculations based on a spherical model of the head can provide useful information about the magnitude and direction of the current density vector in the brain during tDCS, taking into account the geometry and position of the electrodes. Despite the inherent limitations of the spherical head model, the calculated values are comparable to those used in the most recent in vitro studies on modulation of neuronal activity. The methodology presented in this paper may be used to assess the current distribution during tDCS using new electrode montages, to help optimize montages that target a specific region of the brain or to preliminarily investigate compliance with safety guidelines." @default.
- W2061034794 created "2016-06-24" @default.
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- W2061034794 date "2006-07-01" @default.
- W2061034794 modified "2023-09-30" @default.
- W2061034794 title "Modeling the current distribution during transcranial direct current stimulation" @default.
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- W2061034794 doi "https://doi.org/10.1016/j.clinph.2006.04.009" @default.
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