Shared and disorder-specific event-related brain oscillatory markers of attentional dysfunction in ADHD and bipolar disorder
Attention-deficit/hyperactivity disorder (ADHD) and bipolar disorder (BD) often present with overlapping symptoms and cognitive impairments, such as increased fluctuations in attentional performance measured by increased reaction-time variability (RTV). We previously provided initial evidence of sha...
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| Hauptverfasser: | , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
7 February 2018
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| In: |
Brain topography
Year: 2018, Jahrgang: 31, Heft: 4, Pages: 672-689 |
| ISSN: | 1573-6792 |
| DOI: | 10.1007/s10548-018-0625-z |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/s10548-018-0625-z
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| Verfasserangaben: | Giorgia Michelini, Viryanaga Kitsune, Isabella Vainieri, Georgina M. Hosang, Daniel Brandeis, Philip Asherson, Jonna Kuntsi |
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| 245 | 1 | 0 | |a Shared and disorder-specific event-related brain oscillatory markers of attentional dysfunction in ADHD and bipolar disorder |c Giorgia Michelini, Viryanaga Kitsune, Isabella Vainieri, Georgina M. Hosang, Daniel Brandeis, Philip Asherson, Jonna Kuntsi |
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| 520 | |a Attention-deficit/hyperactivity disorder (ADHD) and bipolar disorder (BD) often present with overlapping symptoms and cognitive impairments, such as increased fluctuations in attentional performance measured by increased reaction-time variability (RTV). We previously provided initial evidence of shared and distinct event-related potential (ERP) impairments in ADHD and BD in a direct electrophysiological comparison, but no study to date has compared neural mechanisms underlying attentional impairments with finer-grained brain oscillatory markers. Here, we aimed to compare the neural underpinnings of impaired attentional processes in ADHD and BD, by examining event-related brain oscillations during a reaction-time task under slow-unrewarded baseline and fast-incentive conditions. We measured cognitive performance, ERPs and brain-oscillatory modulations of power and phase variability in 20 women with ADHD, 20 women with BD (currently euthymic) and 20 control women. Compared to controls, both ADHD and BD groups showed increased RTV in the baseline condition and increased RTV, theta phase variability and lower contingent negative variation in the fast-incentive condition. Unlike controls, neither clinical group showed an improvement from the slow-unrewarded baseline to the fast-incentive condition in attentional P3 amplitude or alpha power suppression. Most impairments did not differ between the disorders, as only an adjustment in beta suppression between conditions (lower in the ADHD group) distinguished between the clinical groups. These findings suggest shared impairments in women with ADHD and BD in cognitive and neural variability, preparatory activity and inability to adjust attention allocation and activation. These overlapping impairments may represent shared neurobiological mechanisms of attentional dysfunction in ADHD and BD, and potentially underlie common symptoms in both disorders. | ||
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| 650 | 4 | |a Attention Deficit Disorder with Hyperactivity | |
| 650 | 4 | |a Bipolar disorder | |
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| 650 | 4 | |a Brain oscillations | |
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| 650 | 4 | |a Contingent Negative Variation | |
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| 650 | 4 | |a Event-related potentials | |
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