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Published in: Journal of Neurology 9/2018

01-09-2018 | Original Communication

The effects of anodal tDCS over the supplementary motor area on gait initiation in Parkinson’s disease with freezing of gait: a pilot study

Authors: Chiahao Lu, Sommer L. Amundsen Huffmaster, Paul J. Tuite, Colum D. MacKinnon

Published in: Journal of Neurology | Issue 9/2018

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Abstract

Objective

We investigated if anodal transcranial direct current stimulation (A-tDCS), applied over the supplementary motor areas (SMAs), could improve gait initiation in Parkinson’s disease (PD) with freezing of gait (FOG).

Methods

In this double-blinded cross-over pilot study, ten PD with FOG underwent two stimulation sessions: A-tDCS (1 mA, 10 min) and sham stimulation. Eight blocks of gait initiation were collected per session: (1) pre-tDCS, with acoustic cueing; (2) pre-tDCS, self-initiated (no cue); and (3–8) post-tDCS, self-initiated. Gait initiation kinetics were analyzed with two-way repeated measures ANOVAs for the effects of A-tDCS.

Results

A-tDCS did not significantly improve the magnitude or timing of anticipatory postural adjustments or the execution of the first step during self-initiated gait compared with baseline measures (p > .13). The lack of significant change was not due to an inability to generate functional APAs since external cueing markedly improved gait initiation (p < .01).

Conclusions

A single dose of A-tDCS over the SMAs did not improve self-initiated gait in PD and FOG. Alternative approaches using a different dose or cortical target are worthy of exploration since individuals demonstrated the capacity to improve.

Significance

Neuromodulation strategies tailored to facilitate SMA activity may be ineffective for the treatment of gait initiation impairment in people with PD and FOG.
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Metadata
Title
The effects of anodal tDCS over the supplementary motor area on gait initiation in Parkinson’s disease with freezing of gait: a pilot study
Authors
Chiahao Lu
Sommer L. Amundsen Huffmaster
Paul J. Tuite
Colum D. MacKinnon
Publication date
01-09-2018
Publisher
Springer Berlin Heidelberg
Published in
Journal of Neurology / Issue 9/2018
Print ISSN: 0340-5354
Electronic ISSN: 1432-1459
DOI
https://doi.org/10.1007/s00415-018-8953-1

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