Situation Awareness in Obsessive Compulsive Disorder and Their Relatives: an Endophenotype Study

Area of Science:

• Neuroscience
• Psychiatry
• Genetics

Background:

• Obsessive-compulsive disorder (OCD) is a heterogeneous brain disorder.
• Endophenotype models are theorized to help understand OCD etiology.
• Situational awareness (SA) deficits, a type of working memory impairment, are explored as a potential endophenotype.

Purpose of the Study:

• To investigate if situational awareness impairments are an endophenotype for OCD.
• To determine if SA deficits are linked to the genetic transmission of OCD.

Main Methods:

• A visuospatial working memory test was used to assess SA task performance.
• Participants included 67 OCD patients, 50 unaffected first-degree relatives, and 41 healthy controls.
• Controls were matched for sex, age, and education.

Main Results:

• OCD patients performed significantly worse than controls on the SA1 task (single and dual).
• Relatives' performance on SA tasks fell between OCD patients and controls.
• No significant differences were found between relatives and OCD patients on any SA assessment.

Conclusions:

• Poor situational awareness is a potential endophenotype for OCD.
• Early perceptual dysfunctions, like SA1 task deficits, may mediate the genetic risk for OCD.