Related Experiment Videos
Contralateral and ipsilateral motor effects after transcranial direct current stimulation.
Bradley W Vines1, Dinesh G Nair, Gottfried Schlaug
1Neuroimaging Laboratory, Department of Neurology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts 02215, USA.
Neuroreport
|April 11, 2006
Summary
Transcranial direct current stimulation (tDCS) impacts motor skill learning. Anodal stimulation enhanced right-hand performance, while cathodal stimulation improved left-hand performance, suggesting interhemispheric roles in motor control.
Area of Science:
- Neuroscience
- Motor Control
- Brain Stimulation
Background:
- Motor skill acquisition involves complex neural processes.
- Interhemispheric communication plays a crucial role in motor function.
- Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique.
Purpose of the Study:
- To investigate the effects of tDCS on motor sequence learning.
- To explore the influence of stimulating the left motor cortex on both hands.
- To examine the role of interhemispheric interactions in motor skill acquisition.
Main Methods:
- Seven healthy adults participated in the study.
- Transcranial direct current stimulation (tDCS) was applied over the left motor area.
- Both anodal and cathodal stimulation protocols were used.
- Contralateral and ipsilateral finger sequence movements were assessed.
Main Results:
- Anodal tDCS significantly improved right-hand performance compared to cathodal stimulation.
- Cathodal tDCS significantly improved left-hand performance compared to anodal stimulation.
- tDCS modulated motor skill acquisition in both hands, with reversed effects.
Conclusions:
- Stimulating the motor cortex, directly or indirectly, affects motor skill acquisition.
- Findings provide evidence for interhemispheric inhibition in corticomotor functioning.
- Results have implications for stroke rehabilitation and motor recovery strategies.