Surmounting retraining limits in musicians' dystonia by transcranial stimulation.

Abstract:

OBJECTIVE:Abnormal cortical excitability is evident in various movement disorders that compromise fine motor control. Here we tested whether skilled finger movements can be restored in musicians with focal hand dystonia through behavioral training assisted by transcranial direct current stimulation to the motor cortex of both hemispheres. METHODS:The bilateral motor cortices of 20 pianists (10 with focal dystonia, 10 healthy controls) were electrically stimulated noninvasively during bimanual mirrored finger movements. RESULTS:We found improvement in the rhythmic accuracy of sequential finger movements with the affected hand during and after cathodal stimulation over the affected cortex and simultaneous anodal stimulation over the unaffected cortex. The improvement was retained 4 days after intervention. Neither a stimulation with the reversed montage of electrodes nor sham stimulation yielded any improvement. Furthermore, the amount of improvement was positively correlated with the severity of the symptoms. Bihemispheric stimulation without concurrent motor training failed to improve fine motor control, underlining the importance of combined retraining and stimulation for restoring the dystonic symptoms. For the healthy pianists, none of the stimulation protocols enhanced movement accuracy. INTERPRETATION:These results suggest a therapeutic potential of behavioral training assisted by bihemispheric, noninvasive brain stimulation in restoring fine motor control in focal dystonia.

journal_name

Ann Neurol

journal_title

Annals of neurology

authors

Furuya S,Nitsche MA,Paulus W,Altenmüller E

doi

10.1002/ana.24151

subject

Has Abstract

pub_date

2014-05-01 00:00:00

pages

700-7

issue

5

eissn

0364-5134

issn

1531-8249

journal_volume

75

pub_type

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