Anodal tDCS over Primary Motor Cortex Provides No Advantage to Learning Motor Sequences via Observation.
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Authors
Apšvalka, Dace
Ramsey, Richard
Cross, Emily S
Publication Date
2018Journal Title
Neural Plasticity
ISSN
1687-5443
Publisher
Hindawi Publishing Corporation
Volume
2018
Number
1237962
Language
eng
Type
Article
This Version
VoR
Metadata
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Apšvalka, D., Ramsey, R., & Cross, E. S. (2018). Anodal tDCS over Primary Motor Cortex Provides No Advantage to Learning Motor Sequences via Observation.. Neural Plasticity, 2018 (1237962) https://doi.org/10.1155/2018/1237962
Abstract
When learning a new motor skill, we benefit from watching others. It has been suggested that observation of others' actions can build a motor representation in the observer, and as such, physical and observational learning might share a similar neural basis. If physical and observational learning share a similar neural basis, then motor cortex stimulation during observational practice should similarly enhance learning by observation as it does through physical practice. Here, we used transcranial direct-current stimulation (tDCS) to address whether anodal stimulation to M1 during observational training facilitates skill acquisition. Participants learned keypress sequences across four consecutive days of observational practice while receiving active or sham stimulation over M1. The results demonstrated that active stimulation provided no advantage to skill learning over sham stimulation. Further, Bayesian analyses revealed evidence in favour of the null hypothesis across our dependent measures. Our findings therefore provide no support for the hypothesis that excitatory M1 stimulation can enhance observational learning in a similar manner to physical learning. More generally, the results add to a growing literature that suggests that the effects of tDCS tend to be small, inconsistent, and hard to replicate. Future tDCS research should consider these factors when designing experimental procedures.
Sponsorship
This work was supported by the Ministry of Defence of the United Kingdom Defence Science and Technology Laboratory (Grant no. DSTLX-1000083177 to Emily S. Cross and Richard Ramsey), the Economic and Social Research Council (Grant no. ES/K001884/1 to Richard Ramsey
and ES/K001892/1 to Emily S. Cross), and the funding from the European Commission to Emily S. Cross (CIG11- 2012-322256 and ERC-2015-STG-677270).
Funder references
Medical Research Council (MC_UU_00005/1)
Identifiers
External DOI: https://doi.org/10.1155/2018/1237962
This record's URL: https://www.repository.cam.ac.uk/handle/1810/279045
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