Investigating brain structure and tDCS response in obsessive-compulsive disorder

Area of Science:

• Neuroscience
• Psychiatry
• Medical Imaging

Background:

• Obsessive-Compulsive Disorder (OCD) involves intrusive thoughts and repetitive behaviors.
• Brain abnormalities in specific regions are associated with OCD.
• Transcranial Direct Current Stimulation (tDCS) is a potential treatment modality for OCD.

Purpose of the Study:

• To investigate the correlation between neural biomarkers and tDCS treatment response in OCD patients.
• To identify potential predictors of tDCS efficacy in OCD.
• To explore structural brain differences in OCD patients compared to controls.

Main Methods:

• Structural Magnetic Resonance Imaging (sMRI) data from 55 OCD patients and 28 controls were analyzed.
• Cortical thickness and gray matter morphometry were assessed.
• Correlation analyses were performed between neuroimaging findings and clinical outcomes (YBOCS scores).

Main Results:

• OCD patients exhibited thicker precentral and paracentral cortical areas compared to controls (p < 0.001).
• A significant correlation was found between thinner precentral cortical thickness and reduced Yale-Brown Obsessive Compulsive Scale (YBOCS) scores (p = 0.02).
• These findings suggest potential neural markers for tDCS response in OCD.

Conclusions:

• Neural biomarkers, specifically precentral cortical thickness, may predict tDCS response in OCD.
• Understanding these biomarkers is crucial for developing personalized treatment strategies.
• Further research with larger cohorts is needed to validate these findings and explore underlying mechanisms.