The purpose of this Study is to determine whether non-invasive transcranial direct current stimulation (tDCS) is effective in increasing rehabilitation effects after stroke in visual Cortex.
Visual field defects after posterior cerebral artery stroke can be improved by vision restoration training (VRT), but when combined with transcranial direct current stimulation (tDCS) which alters brain excitability, vision restoration can be potentiated in the chronic stage. Because it is possible that such therapy may be more effective during the early recovery phase after the stroke and can reach patients during the rehabilitation phase, investigators wished to explore the applicability, efficacy and safety of early intervention with a combined tDCS/VRT treatment. 19 post-acute stroke homonymous hemianopia patients were randomly assigned to either 10 sessions of combined rea-tDCS (2mA, 10 daily sessions of 15-20 min) and VRT, or sham-tDCS and VRT. The primary outcome criterion was the pre-post change in perimetric detection thresholds. Secondary outcome is neurophysiological changes in EEG measures (VEP, Connectivity, Spectral Power, ...)
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Enrollment
19
real transcranial direct current stimulation,10 sessions, 2mA for 20 minutes
sham transcranial direct current stimulation, 10 sessions, for 20 minutes
Vision restoration training, 10 sessions, 20 minutes
Neurologisches Therapiezentrum Gmundnerberg
Altmünster, Austria
Inst. f. Medical Psychology, Univ. of Magdeburg
Magdeburg, Germany
Change of mean sensitivity (in dB) detection threshold from baseline to post-intervention and follow up
Time frame: 14-20 days post treatment, 3 months follow up
Change in power spectra (Volts-squared per Hz (V^2/Hz) from baseline to post-intervention and follow up
power spectra (Volts-squared per Hz (V\^2/Hz)
Time frame: 14-20 days post treatment, 3 months follow up
Change in VEP latencies (ms) from baseline to post-intervention and follow up
VEP latencies (ms)
Time frame: 14-20 days post treatment, 3 months follow up
Change in VEP amplitudes (µV) from baseline to post-intervention and follow up
VEP amplitudes (µV)
Time frame: 14-20 days post treatment, 3 months follow up
Change in network coherence from baseline to post-intervention and follow up
network coherence correlations
Time frame: 14-20 days post treatment, 3 months follow up
Number of participants with treatment-related adverse events assessed by a questionnaire
questionnaire recording adverse effects
Time frame: up to 4 months
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