Journal
BIPOLAR DISORDERS
Volume 17, Issue 8, Pages 849-858Publisher
WILEY
DOI: 10.1111/bdi.12350
Keywords
bipolar disorder; sustained attention; transcranial direct current stimulation; working memory
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Funding
- NARSAD Young Investigator Award (DMM)
- R. D. Wright Biomedical Research Fellowship from NHMRC [1061875]
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ObjectivesTo investigate the use of transcranial direct current stimulation (tDCS) for enhancing working memory and sustained attention in euthymic patients with bipolar disorder. MethodsFifteen patients with bipolar disorder received anodal left prefrontal tDCS with an extracephalic cathode (prefrontal condition), anodal left prefrontal and cathodal cerebellar tDCS (fronto-cerebellar condition), and sham tDCS given online' during performance on a working memory and sustained attention task in an intra-individual, cross-over, sham-controlled experimental design. Exploratory cluster analyses examined responders and non-responders for the different active tDCS conditions on both tasks. ResultsFor working memory, approximately one-third of patients in both active tDCS conditions showed performance improvement. For sustained attention, three of 15 patients showed performance improvement with prefrontal tDCS. Responders to active tDCS for working memory performed more poorly on the task during sham tDCS compared to non-responders. ConclusionsA single session of active prefrontal or fronto-cerebellar tDCS failed to improve working memory or sustained attention performance in euthymic patients with bipolar disorder. Several important considerations are discussed in relation to future studies investigating tDCS for enhancing cognition in patients with bipolar disorder.
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