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Anodal transcranial direct current stimulation of the motor cortex increases cortical voluntary activation and neural plasticity

Frazer, Ashlyn, Williams, Jacqueline, Spittles, Michael, Rantalainen, Timo and Kidgell, Dawson 2016, Anodal transcranial direct current stimulation of the motor cortex increases cortical voluntary activation and neural plasticity, Muscle and nerve, vol. 54, no. 5, pp. 903-913, doi: 10.1002/mus.25143.

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Title Anodal transcranial direct current stimulation of the motor cortex increases cortical voluntary activation and neural plasticity
Author(s) Frazer, Ashlyn
Williams, Jacqueline
Spittles, Michael
Rantalainen, TimoORCID iD for Rantalainen, Timo orcid.org/0000-0001-6977-4782
Kidgell, Dawson
Journal name Muscle and nerve
Volume number 54
Issue number 5
Start page 903
End page 913
Total pages 11
Publisher Wiley
Place of publication London, Eng.
Publication date 2016-11
ISSN 1097-4598
Keyword(s) BDNF polymorphism
cortical voluntary activation
motor performance
neural plasticity
strength
transcranial direct current stimulation
Summary INTRODUCTION: We examined the cumulative effect of 4 consecutive bouts of non-invasive brain stimulation on corticospinal plasticity and motor performance, and whether these responses were influenced by the brain-derived neurotrophic factor (BDNF) polymorphism.

METHODS: In a randomized double-blinded cross-over design, changes in strength and indices of corticospinal plasticity were analyzed in 14 adults who were exposed to 4 consecutive sessions of anodal and sham transcranial direct current stimulation (tDCS). Participants also undertook a blood sample for BDNF genotyping (N=13).

RESULTS: We observed a significant increase in isometric wrist flexor strength with transcranial magnetic stimulation revealing increased corticospinal excitability, decreased silent period duration, and increased cortical voluntary activation compared to sham tDCS.

DISCUSSION: The results show that 4 consecutive sessions of anodal tDCS increased cortical voluntary activation manifested as an improvement in strength. Induction of corticospinal plasticity appears to be influenced by the BDNF polymorphism.
Language eng
DOI 10.1002/mus.25143
Field of Research 110699 Human Movement and Sports Science not elsewhere classified
Socio Economic Objective 929999 Health not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Wiley
Persistent URL http://hdl.handle.net/10536/DRO/DU:30082856

Document type: Journal Article
Collection: School of Exercise and Nutrition Sciences
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