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Interactive effects of music and prefrontal cortex stimulation in modulating response inhibition.

ABSTRACT: Influential hypotheses propose that alterations in emotional state influence decision processes and executive control of behavior. Both music and transcranial direct current stimulation (tDCS) of prefrontal cortex affect emotional state, however interactive effects of music and tDCS on executive functions remain unknown. Learning to inhibit inappropriate responses is an important aspect of executive control which is guided by assessing the decision outcomes such as errors. We found that high-tempo music, but not low-tempo music or low-level noise, significantly influenced learning and implementation of inhibitory control. In addition, a brief period of tDCS over prefrontal cortex specifically interacted with high-tempo music and altered its effects on executive functions. Measuring event-related autonomic and arousal response of participants indicated that exposure to task demands and practice led to a decline in arousal response to the decision outcome and high-tempo music enhanced such practice-related processes. However, tDCS specifically moderated the high-tempo music effect on the arousal response to errors and concomitantly restored learning and improvement in executive functions. Here, we show that tDCS and music interactively influence the learning and implementation of inhibitory control. Our findings indicate that alterations in the arousal-emotional response to the decision outcome might underlie these interactive effects.

SUBMITTER: Mansouri FA

PROVIDER: S-EPMC5741740 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature

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Interactive effects of music and prefrontal cortex stimulation in modulating response inhibition.

Mansouri Farshad Alizadeh FA Acevedo Nicola N Illipparampil Rosin R Fehring Daniel J DJ Fitzgerald Paul B PB Jaberzadeh Shapour S

Scientific reports 20171222 1

Influential hypotheses propose that alterations in emotional state influence decision processes and executive control of behavior. Both music and transcranial direct current stimulation (tDCS) of prefrontal cortex affect emotional state, however interactive effects of music and tDCS on executive functions remain unknown. Learning to inhibit inappropriate responses is an important aspect of executive control which is guided by assessing the decision outcomes such as errors. We found that high-tem ...[more]

PMID: 29273796

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Project description:OBJECTIVES:Implicit regulation of emotions involves medial-prefrontal cortex (mPFC) regions exerting regulatory control over limbic structures. Diminished regulation relates to aberrant mPFC functionality and psychopathology. Establishing means of modulating mPFC functionality could benefit research on emotion and its dysregulation. Here, we tested the capacity of transcranial direct current stimulation (tDCS) targeting mPFC to modulate subjective emotional states by facilitating implicit emotion regulation. MATERIALS AND METHODS:Stimulation was applied concurrently with functional magnetic resonance imaging to validate its neurobehavioral effect. Sixteen participants were each scanned twice, counterbalancing active and sham tDCS application, while undergoing negative mood induction (clips featuring negative vs. neutral contents). Effects of stimulation on emotional experience were assessed using subjective and neural measures. RESULTS:Subjectively, active stimulation led to significant reduction in reported intensity of experienced emotions to negatively valenced (p?=?0.005) clips but not to neutral clips (p?>?0.99). Active stimulation further mitigated a rise in stress levels from pre- to post-induction (sham: p?=?0.004; active: p?=?0.15). Neurally, stimulation increased activation in mPFC regions associated with implicit emotion regulation (ventromedial-prefrontal cortex; subgenual anterior-cingulate cortex, sgACC), and in ventral striatum, a core limbic structure (all ps?<?0.05). Stimulation also altered functional connectivity (assessed using whole-brain psycho-physiological interaction) between these regions, and with additional limbic regions. Stimulation-induced sgACC activation correlated with reported emotion intensity and depressive symptoms (rs?>?0.64, ps?<?0.018), suggesting individual differences in stimulation responsivity. CONCLUSIONS:Results of this study indicate the potential capacity of tDCS to facilitate brain activation in mPFC regions underlying implicit regulation of emotion and accordingly modulate subjective emotional experiences.

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Interactive effects of music and prefrontal cortex stimulation in modulating response inhibition.

Publications

Interactive effects of music and prefrontal cortex stimulation in modulating response inhibition.

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