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- W4386009520 abstract "ObjectivesWhen administered in repeated daily doses, transcranial direct current stimulation (tDCS) directed to the prefrontal cortex has cumulative efficacy for the treatment of depression. Depression can be marked by altered processing of emotionally salient information. An acute marker of response to tDCS may be measured as an immediate change in emotional information processing. Using an easily administered web-based task, we tested immediate changes in emotional information processing in acute response to tDCS in participants with and without depression.Materials and MethodsWe enrolled n = 21 women with mild-to-moderate depression and n = 20 controls without depression to complete a web-based visual search task before and after 30 minutes of tDCS directed to the prefrontal cortex. The timed task required participants to identify a target face among arrays showing sad, neutral, or mixed (distractor) expressions.ResultsAt baseline, as predicted, the participants with depression differed from those without in emotional processing speed (mean z score difference −0.66 ± 0.27, p = 0.022) and accuracy in identifying sad stimuli (error rate: 4.4% vs 1.8%, p = 0.039). In response to tDCS, the participants with depression became significantly faster on the distractor condition (pre- vs post-tDCS z scores: −0.45 ± 0.65 vs −0.85 ± 0.65, p = 0.009), suggesting a specific reduction in bias toward negative emotional information. In response to tDCS, the depressed group also had significant improvements in self-reported mood (increased happy, decreased sad and anxious mood).ConclusionsParticipants with depression vs those without were differentiated by their performance of the visual search task at baseline and in response to tDCS. Given that measurable effects on depression scales may require weeks of tDCS treatments, acute change in emotional information processing can serve as an easily obtainable marker of depression and its response to tDCS.Clinical Trial RegistrationThe Clinicaltrials.gov registration number for the study is NCT05188248." @default.
- W4386009520 created "2023-08-21" @default.
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- W4386009520 date "2023-08-01" @default.
- W4386009520 modified "2023-10-02" @default.
- W4386009520 title "Immediate and Differential Response to Emotional Stimuli Associated With Transcranial Direct Current Stimulation for Depression: A Visual-Search Task Pilot Study" @default.
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- W4386009520 doi "https://doi.org/10.1016/j.neurom.2023.07.006" @default.
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