Cognitive control in childhood-onset obsessive-compulsive disorder: a functional MRI study

Area of Science:

• Neuroscience
• Cognitive Psychology
• Psychiatry

Background:

• Chronic obsessive-compulsive symptoms (OCD) are linked to impaired cognitive control.
• Investigating the specific brain regions involved in this cognitive dysfunction is crucial for understanding OCD.
• Altered brain activity in OCD may underlie difficulties in resisting compulsive behaviors.

Purpose of the Study:

• To identify cerebral regions associated with cognitive control deficits in childhood-onset obsessive-compulsive disorder (OCD).
• To compare brain activity between adolescents/young adults with OCD and healthy controls during a conflict task.
• To explore how symptom resistance influences neural activation patterns in OCD.

Main Methods:

• Event-related functional magnetic resonance imaging (fMRI) was employed.
• A conflict task involving prime-target number stimuli was administered to participants.
• Brain imaging data from 12 adolescents/young adults with OCD and healthy controls were analyzed, with further subgroup analysis based on symptom resistance.

Main Results:

• Obsessive-compulsive disorder (OCD) subjects showed greater activation in the anterior cingulate gyrus and left parietal lobe compared to controls during prime-target repetition.
• Non-resistant OCD patients exhibited increased activation in a bilateral network, including the precuneus, pulvinar, and paracentral lobules, compared to resistant patients.
• These findings suggest distinct neural correlates for symptom resistance in OCD.

Conclusions:

• Elevated regional brain activity in OCD subjects indicates an abnormal amplification process during visual discrimination.
• The specific pattern of functional brain changes in OCD may be modulated by the individual's capacity to resist obsessive symptoms.
• Understanding these neural differences can inform targeted interventions for OCD.