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Response inhibition deficits in obsessive-compulsive disorder.
Shelley Bannon1, Craig J Gonsalvez, Rodney J Croft
1Department of Psychology, University of Wollongong, Australia. shelley@app-practice.com
Psychiatry Research
|June 12, 2002
Summary
Individuals with obsessive-compulsive disorder (OCD) show significant impairments in behavioral and cognitive inhibition. These deficits in controlling irrelevant information may contribute to the core symptoms of OCD, including obsessions and compulsions.
Area of Science:
- Neuroscience
- Psychiatry
- Cognitive Psychology
Background:
- Difficulty inhibiting irrelevant information is hypothesized to be a key factor in the development of obsessive-compulsive disorder (OCD).
- Understanding inhibition deficits is crucial for explaining the repetitive behaviors characteristic of OCD.
Purpose of the Study:
- To investigate behavioral and cognitive inhibition deficits in individuals with OCD.
- To compare inhibition performance between OCD patients and a control group with panic disorder.
Main Methods:
- A Go/Nogo task was used to assess behavioral inhibition.
- A Stroop test was employed to measure cognitive inhibition.
- Participants included 20 individuals with OCD and 20 with panic disorder.
Main Results:
- OCD subjects committed more errors on the Go/Nogo task, indicating poorer behavioral inhibition.
- OCD subjects exhibited more errors and longer reaction times on the Stroop interference trial, suggesting impaired cognitive inhibition.
- A trend indicated that higher OCD severity correlated with faster reaction times on the Stroop task.
Conclusions:
- Individuals with OCD demonstrate significant deficits in both behavioral and cognitive inhibition.
- These identified inhibition impairments may underlie the obsessions and compulsions seen in OCD.
- The findings highlight the role of inhibitory control dysfunction in the pathophysiology of obsessive-compulsive disorder.