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Related Experiment Video

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In Vivo Intracellular Recording of Type-Identified Rat Spinal Motoneurons During Trans-Spinal Direct Current Stimulation
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Transcutaneous Spinal Direct Current Stimulation Alters Resting-State Functional Connectivity.

Lauren Schweizer1, Christine H Meyer-Frießem2, Peter K Zahn2

  • 11 Department of Neurology, Berufsgenossenschaftliches Universitätsklinikum Bergmannsheil GmbH Bochum, Ruhr-University Bochum , Bochum, Germany .

Brain Connectivity
|May 31, 2017
PubMed
Summary

Transcutaneous spinal direct current stimulation (tsDCS) alters brain connectivity. This noninvasive method impacts sensory networks, suggesting potential for targeted neuromodulation therapies.

Keywords:
fMRIfunctional connectivityresting statespinalstimulationtranscutaneoustsDCS

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Area of Science:

  • Neuroscience
  • Neuromodulation
  • Functional Neuroimaging

Background:

  • Transcutaneous spinal direct current stimulation (tsDCS) is a noninvasive neuromodulation technique.
  • Evidence suggests tsDCS affects spinal reflexes and sensory pathways.
  • Supraspinal effects of tsDCS on brain connectivity remain under-investigated.

Purpose of the Study:

  • To investigate tsDCS-induced alterations in intrinsic functional connectivity (FC) within the human brain.
  • To explore the supraspinal effects of tsDCS on somatosensory cortical networks.
  • To determine if neurophysiological changes from tsDCS correlate with spontaneous brain activity.

Main Methods:

  • A double-blind, crossover study design involving 20 healthy men.
  • Resting-state functional magnetic resonance imaging (fMRI) was used to measure FC.
  • Seed-to-voxel analyses focused on the primary somatosensory cortex (S1) and thalamus before and after anodal, cathodal, and sham tsDCS.

Main Results:

  • Anodal tsDCS decreased connectivity between S1 and the ipsilateral posterior insula, and between the thalamus and anterior cingulate cortex.
  • Anodal tsDCS increased connectivity between S1 and the thalamus.
  • Cathodal tsDCS increased FC between the thalamus and posterior insula, and decreased S1-occipital cortex connectivity.

Conclusions:

  • tsDCS demonstrates measurable supraspinal effects on brain functional connectivity.
  • The findings suggest tsDCS can modulate cortical sensory networks.
  • tsDCS shows potential as a noninvasive intervention for targeting sensory processing.