User profiles for Alexander Opitz

Alexander Opitz

University of Minnesota
Verified email at umn.edu
Cited by 6632

Transcranial focused ultrasound modulates the activity of primary somatosensory cortex in humans

W Legon, TF Sato, A Opitz, J Mueller, A Barbour… - Nature …, 2014 - nature.com
Improved methods of noninvasively modulating human brain function are needed. Here we
probed the influence of transcranial focused ultrasound (tFUS) targeted to the human …

Determinants of the electric field during transcranial direct current stimulation

A Opitz, W Paulus, S Will, A Antunes, A Thielscher - Neuroimage, 2015 - Elsevier
Transcranial direct current stimulation (tDCS) causes a complex spatial distribution of the
electric current flow in the head which hampers the accurate localization of the stimulated brain …

How the brain tissue shapes the electric field induced by transcranial magnetic stimulation

A Opitz, M Windhoff, RM Heidemann, R Turner… - Neuroimage, 2011 - Elsevier
In transcranial magnetic stimulation (TMS), knowledge of the distribution of the induced electric
field is fundamental for a better understanding of the position and extent of the stimulated …

Electric field calculations in brain stimulation based on finite elements: an optimized processing pipeline for the generation and usage of accurate individual head …

M Windhoff, A Opitz, A Thielscher - 2013 - Wiley Online Library
The need for realistic electric field calculations in human noninvasive brain stimulation is
undisputed to more accurately determine the affected brain areas. However, using numerical …

Impact of the gyral geometry on the electric field induced by transcranial magnetic stimulation

A Thielscher, A Opitz, M Windhoff - Neuroimage, 2011 - Elsevier
The spatial extent of the effects of transcranial magnetic stimulation (TMS) on neural tissue
is only coarsely understood. One key problem is the realistic calculation of the electric field …

[HTML][HTML] Immediate neurophysiological effects of transcranial electrical stimulation

…, S Henin, MR Krause, Y Huang, A Opitz… - Nature …, 2018 - nature.com
Noninvasive brain stimulation techniques are used in experimental and clinical fields for
their potential effects on brain network dynamics and behavior. Transcranial electrical …

[HTML][HTML] Spatiotemporal structure of intracranial electric fields induced by transcranial electric stimulation in humans and nonhuman primates

A Opitz, A Falchier, CG Yan, EM Yeagle, GS Linn… - Scientific reports, 2016 - nature.com
Transcranial electric stimulation (TES) is an emerging technique, developed to non-invasively
modulate brain function. However, the spatiotemporal distribution of the intracranial …

TDCS increases cortical excitability: direct evidence from TMS–EEG

…, G Mattavelli, S Convento, A Pisoni, A Opitz… - Cortex, 2014 - Elsevier
Despite transcranial direct current stimulation (tDCS) is increasingly used in experimental
and clinical settings, its precise mechanisms of action remain largely unknown. At a neuronal …

Dose-dependent effects of transcranial alternating current stimulation on spike timing in awake nonhuman primates

…, J Krieg, A Doyle, Y Yu, J Vitek, M Johnson, A Opitz - Science …, 2020 - science.org
Weak extracellular electric fields can influence spike timing in neural networks. Approaches
to noninvasively impose these fields on the brain have high therapeutic potential in …

[HTML][HTML] Neurocognitive, physiological, and biophysical effects of transcranial alternating current stimulation

M Wischnewski, I Alekseichuk, A Opitz - Trends in Cognitive Sciences, 2023 - cell.com
Transcranial alternating current stimulation (tACS) can modulate human neural activity and
behavior. Accordingly, tACS has vast potential for cognitive research and brain disorder …