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Clinical Trial Summary

With this study we will be able to dose-dependently measure real-time glucose metabolism changes after non-invasively stimulating superficial parts of the dlPFC, a commonly used target in therapeutic tDCS applications. This will provide further insight if and how tDCS is capable to change one of most reliable parameters of brain metabolism.

Clinical Trial Description

With this study, we will be able to substantiate if regional and whole brain glucose metabolism is affected by tDCS, assess the amount of signal change in relation to different currents and measure differences in glucose metabolism under stimulation reactivity between healthy subjects and depressive patients. The objective is to investigate the changes of regional cerebral metabolic rate of glucose (rCMRglu) in the brain after transcranial direct current stimulation in healthy subjects and depressive patients. The design is a cross-sectional proof of principle study in 20 healthy subjects and 20 depressed patients. During the PET scan tDCS will be applied with varying stimulus intensity. Furthermore, subjects will undergo a second PET scan with single-blind sham stimulation in order to validate the effects of tDCS. rCMRglu will be quantified using voxel-wise and ROI-based approaches. Changes in rCMRglu associated with tDCS-application will be calculated with a general linear model in a ramp function of the task-specific glucose uptake, according to previous work in our group. Exploratory statistical testing will be done using a paired samples t-test between task and rest conditions. ;

Study Design

Related Conditions & MeSH terms

NCT number NCT02999607
Study type Interventional
Source Medical University of Vienna
Status Completed
Phase N/A
Start date December 2016
Completion date September 1, 2017

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