This study investigates the beneficial effects of prefrontal brain stimulation (with transcranial direct current stimulation \[tDCS\]) during working memory training in seniors with mild cognitive impairments.The placebo-controlled double blinded study includes 50 elderly patients which will be randomized into verum or sham tDCS.
In this project, we want to test whether the effectiveness of neuropsychological exercise therapy can be increased in elderly persons suspected of having an MCI by means of parallel tDCS treatment. All test participants train over 6 sessions within 2 weeks two different working memory tasks with increasing difficulty. In the randomized, double-blind, prospective therapy study, participants are assigned to either a Verum-tDCS or a placebo-tDCS group. The Verum-tDCS group receives active stimulation in parallel to the exercise therapy, while the placebo group does not receive tDCS stimulation. To check the effects of the therapy, we measure performance and neuronal activation in different executive tasks using near-infrared spectroscopy (NIRS). Furthermore, we will check whether the training increases the volume of the grey matter (Draganski et al., 2004, Malchow et al., 2016) and the expression of BDNF can be increased (Schuch et al., 2015).
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Neuropsychological (working memory) training for 30 minutes, 6 sessions tDCS during training with 2 mA
Neuropsychological (working memory) training for 30 minutes, 6 sessions tDCS during training with 0 mA
University Hospital
Würzburg, Germany
Brain activation measured with NIRS
The Investigators are measuring brain activation during executive functions
Time frame: 4 weeks
Reaction times, errors and number of generated words in neuropsychological tasks
The Investigators are measuring cognitive performance for different executive functions
Time frame: 4 weeks
T1 weighted magnetic resonance Imaging (MRI) of the brain
Structural changes in grey matter of the brain calculated by voxel based morphometry (VBM)
Time frame: 4 weeks
Blood sampling
Increased BDNF secretion in serum
Time frame: 4 weeks
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