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Mood modulates auditory laterality of hemodynamic mismatch responses during dichotic listening.

Schock L, Dyck M, Demenescu LR, Edgar JC, Hertrich I, Sturm W, Mathiak K - PLoS ONE (2012)

Bottom Line: Deviant sounds reliably activated bilateral auditory cortices and confirmed attention effects by modulation of visual activity.A lateralization effect of emotion-attention interaction was reflected in a stronger response to right-ear deviants in the right auditory cortex during sad mood.Conceivably, the compensatory right-hemispheric enhancement of resources elicits increased ipsilateral processing.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychiatry, Psychotherapy and Psychosomatics, Medical School, RWTH Aachen University, Aachen, Germany. lisa.schock@rwth-aachen.de

ABSTRACT
Hemodynamic mismatch responses can be elicited by deviant stimuli in a sequence of standard stimuli even during cognitive demanding tasks. Emotional context is known to modulate lateralized processing. Right-hemispheric negative emotion processing may bias attention to the right and enhance processing of right-ear stimuli. The present study examined the influence of induced mood on lateralized pre-attentive auditory processing of dichotic stimuli using functional magnetic resonance imaging (fMRI). Faces expressing emotions (sad/happy/neutral) were presented in a blocked design while a dichotic oddball sequence with consonant-vowel (CV) syllables in an event-related design was simultaneously administered. Twenty healthy participants were instructed to feel the emotion perceived on the images and to ignore the syllables. Deviant sounds reliably activated bilateral auditory cortices and confirmed attention effects by modulation of visual activity. Sad mood induction activated visual, limbic and right prefrontal areas. A lateralization effect of emotion-attention interaction was reflected in a stronger response to right-ear deviants in the right auditory cortex during sad mood. This imbalance of resources may be a neurophysiological correlate of laterality in sad mood and depression. Conceivably, the compensatory right-hemispheric enhancement of resources elicits increased ipsilateral processing.

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Related in: MedlinePlus

Scheme of an experimental run inducing sadness.A dichotic oddball paradigm was presented to elicit pre-attentive auditory processing during the mood induction task. A visuospatial attention task was added to ‘wash out’ induced mood and attention lateralization prior to the next run; SAM: Self-Assessment Manikin, ESR: Emotional Self-Rating, LE: left ear, RE: right ear.
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pone-0031936-g001: Scheme of an experimental run inducing sadness.A dichotic oddball paradigm was presented to elicit pre-attentive auditory processing during the mood induction task. A visuospatial attention task was added to ‘wash out’ induced mood and attention lateralization prior to the next run; SAM: Self-Assessment Manikin, ESR: Emotional Self-Rating, LE: left ear, RE: right ear.

Mentions: Mood induction was carried out in a blocked fMRI design (Figure 1, [24]). Sad mood, happy mood, and neutral mood were induced by instructing the subjects to look at the faces and feel the emotion they perceived. The entire session was subdivided into six mood induction runs. Each run was assigned to a single target mood, resulting in two runs per emotion across the entire experiment. The order of the mood induction runs was randomized and balanced across subjects. Within each run, emotions were presented in three blocks of mood induction, with each block preceded by a resting baseline (display of a fixation cross). Emotional block duration was 44 seconds, comprising eight facial stimuli shown for five seconds each in addition to the SAM ratings (Self-Assessment Manikin, SAM; [30]). The order of stimuli was counterbalanced within every run.


Mood modulates auditory laterality of hemodynamic mismatch responses during dichotic listening.

Schock L, Dyck M, Demenescu LR, Edgar JC, Hertrich I, Sturm W, Mathiak K - PLoS ONE (2012)

Scheme of an experimental run inducing sadness.A dichotic oddball paradigm was presented to elicit pre-attentive auditory processing during the mood induction task. A visuospatial attention task was added to ‘wash out’ induced mood and attention lateralization prior to the next run; SAM: Self-Assessment Manikin, ESR: Emotional Self-Rating, LE: left ear, RE: right ear.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3285192&req=5

pone-0031936-g001: Scheme of an experimental run inducing sadness.A dichotic oddball paradigm was presented to elicit pre-attentive auditory processing during the mood induction task. A visuospatial attention task was added to ‘wash out’ induced mood and attention lateralization prior to the next run; SAM: Self-Assessment Manikin, ESR: Emotional Self-Rating, LE: left ear, RE: right ear.
Mentions: Mood induction was carried out in a blocked fMRI design (Figure 1, [24]). Sad mood, happy mood, and neutral mood were induced by instructing the subjects to look at the faces and feel the emotion they perceived. The entire session was subdivided into six mood induction runs. Each run was assigned to a single target mood, resulting in two runs per emotion across the entire experiment. The order of the mood induction runs was randomized and balanced across subjects. Within each run, emotions were presented in three blocks of mood induction, with each block preceded by a resting baseline (display of a fixation cross). Emotional block duration was 44 seconds, comprising eight facial stimuli shown for five seconds each in addition to the SAM ratings (Self-Assessment Manikin, SAM; [30]). The order of stimuli was counterbalanced within every run.

Bottom Line: Deviant sounds reliably activated bilateral auditory cortices and confirmed attention effects by modulation of visual activity.A lateralization effect of emotion-attention interaction was reflected in a stronger response to right-ear deviants in the right auditory cortex during sad mood.Conceivably, the compensatory right-hemispheric enhancement of resources elicits increased ipsilateral processing.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychiatry, Psychotherapy and Psychosomatics, Medical School, RWTH Aachen University, Aachen, Germany. lisa.schock@rwth-aachen.de

ABSTRACT
Hemodynamic mismatch responses can be elicited by deviant stimuli in a sequence of standard stimuli even during cognitive demanding tasks. Emotional context is known to modulate lateralized processing. Right-hemispheric negative emotion processing may bias attention to the right and enhance processing of right-ear stimuli. The present study examined the influence of induced mood on lateralized pre-attentive auditory processing of dichotic stimuli using functional magnetic resonance imaging (fMRI). Faces expressing emotions (sad/happy/neutral) were presented in a blocked design while a dichotic oddball sequence with consonant-vowel (CV) syllables in an event-related design was simultaneously administered. Twenty healthy participants were instructed to feel the emotion perceived on the images and to ignore the syllables. Deviant sounds reliably activated bilateral auditory cortices and confirmed attention effects by modulation of visual activity. Sad mood induction activated visual, limbic and right prefrontal areas. A lateralization effect of emotion-attention interaction was reflected in a stronger response to right-ear deviants in the right auditory cortex during sad mood. This imbalance of resources may be a neurophysiological correlate of laterality in sad mood and depression. Conceivably, the compensatory right-hemispheric enhancement of resources elicits increased ipsilateral processing.

Show MeSH
Related in: MedlinePlus