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Neural mechanisms of frustration in chronically irritable children
Insights
Children with severe irritability show reduced brain activation in emotion and attention areas when frustrated. This may explain emotion regulation difficulties in severe mood dysregulation disorder.
Area of Science:
- Neuroscience
- Child and Adolescent Psychiatry
- Developmental Psychology
Background:
- Irritability is a common symptom in children and adolescents.
- Severe irritability is the primary symptom of disruptive mood dysregulation disorder (DMDD), a new DSM-5 diagnosis.
- Neural underpinnings of severe irritability and its response to frustration are not well understood.
Purpose of the Study:
- To investigate the neural correlates of frustration in children with severe mood dysregulation.
- To compare brain activity between severely irritable children and healthy controls during frustrating conditions.
Main Methods:
- Functional magnetic resonance imaging (fMRI) study.
- Compared 19 severely irritable children (meeting DMDD criteria) with 23 healthy controls.
- Participants completed a cued-attention task under non-frustrating and frustrating conditions, receiving feedback.
Main Results:
- Both groups experienced increased frustration and reduced attention shifting under frustration.
- Severely irritable children showed more pronounced frustration effects.
- During frustration with negative feedback, severely irritable children exhibited reduced activation in the amygdala, striatum, parietal cortex, and posterior cingulate compared to controls.
Conclusions:
- Children with severe irritability display abnormal neural responses (reduced activation) in emotion, attention, and reward circuits when facing frustration and negative feedback.
- Frustration exacerbates attention inflexibility in severely irritable children, potentially contributing to emotion regulation deficits.
- Further research is needed to specifically link these neural findings to irritability.
Objective:
Irritability is common in children and adolescents and is the cardinal symptom of disruptive mood dysregulation disorder, a new DSM-5 disorder, yet its neural correlates remain largely unexplored. The authors conducted a functional MRI study to examine neural responses to frustration in children with severe mood dysregulation.
Method:
The authors compared emotional responses, behavior, and neural activity between 19 severely irritable children (operationalized using criteria for severe mood dysregulation) and 23 healthy comparison children during a cued-attention task completed under nonfrustrating and frustrating conditions.
Results:
Children in both the severe mood dysregulation and the healthy comparison groups reported increased frustration and exhibited decreased ability to shift spatial attention during the frustration condition relative to the nonfrustration condition. However, these effects of frustration were more marked in the severe mood dysregulation group than in the comparison group. During the frustration condition, participants in the severe mood dysregulation group exhibited deactivation of the left amygdala, the left and right striatum, the parietal cortex, and the posterior cingulate on negative feedback trials, relative to the comparison group (i.e., between-group effect) and to the severe mood dysregulation group's responses on positive feedback trials (i.e., within-group effect). In contrast, neural response to positive feedback during the frustration condition did not differ between groups.
Conclusions:
In response to negative feedback received in the context of frustration, children with severe, chronic irritability showed abnormally reduced activation in regions implicated in emotion, attention, and reward processing. Frustration appears to reduce attention flexibility, particularly in severely irritable children, which may contribute to emotion regulation deficits in this population. Further research is needed to relate these findings to irritability specifically, rather than to other clinical features of severe mood dysregulation.
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