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Effects of transcranial direct current stimulation on the functional coupling of the sensorimotor cortical network.
- Source :
-
NeuroImage [Neuroimage] 2016 Oct 15; Vol. 140, pp. 50-6. Date of Electronic Publication: 2016 Jan 28. - Publication Year :
- 2016
-
Abstract
- Transcranial direct current stimulation (tDCS) is well established-among the non-invasive brain stimulation techniques-as a method to modulate brain excitability. Polarity-dependent modulations of membrane potentials are detected after the application of anodal and cathodal stimulation, leading to changes in the electrical activity of the neurons. The main aim of the present study was to test the hypothesis that tDCS can affect-in a polarity-specific manner-the functional coupling of the sensorimotor areas during the eyes-open resting condition as revealed by total EEG coherence (i.e., coherence across the average of all combinations of the electrode pairs placed around the stimulation electrode). The changes in the total EEG coherence were evaluated pre-, during, and post-anodal and cathodal tDCS. While no differences were observed in the connectivity characteristics of the two pre-stimulation periods, a connectivity increase was observed in the alpha 2 band in the post-anodal tDCS with respect to pre-anodal and post-cathodal tDCS. The present study suggests that a specific approach based on the analyses of the functional coupling of EEG rhythms might enhance understanding of tDCS-induced effects on cortical connectivity. Moreover, this result suggests that anodal tDCS could possibly modify cortical connectivity more effectively with respect to cathodal tDCS.<br /> (Copyright © 2016 Elsevier Inc. All rights reserved.)
- Subjects :
- Evoked Potentials, Motor physiology
Evoked Potentials, Somatosensory physiology
Female
Humans
Male
Neural Pathways physiology
Reproducibility of Results
Sensitivity and Specificity
Young Adult
Alpha Rhythm physiology
Brain Mapping methods
Electroencephalography methods
Nerve Net physiology
Sensorimotor Cortex physiology
Transcranial Magnetic Stimulation methods
Subjects
Details
- Language :
- English
- ISSN :
- 1095-9572
- Volume :
- 140
- Database :
- MEDLINE
- Journal :
- NeuroImage
- Publication Type :
- Academic Journal
- Accession number :
- 26827812
- Full Text :
- https://doi.org/10.1016/j.neuroimage.2016.01.051