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Dysfunction of response inhibition in eating disorders
Madoka Yano1, Naoko Kawano1, Satoshi Tanaka1
1a Department of Psychiatry , Nagoya University Graduate School of Medicine , Nagoya , Japan.
Journal of Clinical and Experimental Neuropsychology
|May 12, 2016
Summary
Eating disorder patients show impaired response inhibition, particularly in error rates, despite preserved attention. This dysfunction may underlie poor impulse control in eating behaviors.
Area of Science:
- Cognitive psychology
- Neuroscience
- Clinical psychology
Background:
- Previous research on response inhibition in eating disorders (ED) yielded inconsistent results.
- Variations in task design and participant underweight severity may explain inconsistencies.
- Understanding response inhibition is crucial for addressing impulse control in ED.
Purpose of the Study:
- To investigate response inhibition deficits in a cohort of eating disorder patients, including severe cases.
- To compare cognitive conflict task performance between ED patients and healthy controls.
- To explore potential links between response inhibition and eating disorder subtypes.
Main Methods:
- Utilized an arrow-space interference task, a cognitive conflict paradigm.
- Compared ED patients (including those with BMI <15 kg/m²) and healthy participants.
- Assessed interference effects on response time and error rates.
Main Results:
- Both groups showed significant interference effects on response time, with no intergroup differences.
- Eating disorder patients exhibited a significantly greater interference effect on error rates compared to controls.
- No significant differences in interference effects were observed across ED subtypes.
Conclusions:
- Attentional control (focused and sustained attention) appears intact in ED patients.
- Evidence suggests a specific dysfunction in response inhibition among individuals with ED.
- This response inhibition deficit may contribute to the characteristic impulse control issues in eating behaviors.
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