The thalamus and its subnuclei-a gateway to obsessive-compulsive disorder
- PMID: 35190533
- PMCID: PMC8861046
- DOI: 10.1038/s41398-022-01823-2
The thalamus and its subnuclei-a gateway to obsessive-compulsive disorder
Abstract
Larger thalamic volume has been found in children with obsessive-compulsive disorder (OCD) and children with clinical-level symptoms within the general population. Particular thalamic subregions may drive these differences. The ENIGMA-OCD working group conducted mega- and meta-analyses to study thalamic subregional volume in OCD across the lifespan. Structural T1-weighted brain magnetic resonance imaging (MRI) scans from 2649 OCD patients and 2774 healthy controls across 29 sites (50 datasets) were processed using the FreeSurfer built-in ThalamicNuclei pipeline to extract five thalamic subregions. Volume measures were harmonized for site effects using ComBat before running separate multiple linear regression models for children, adolescents, and adults to estimate volumetric group differences. All analyses were pre-registered ( https://osf.io/73dvy ) and adjusted for age, sex and intracranial volume. Unmedicated pediatric OCD patients (<12 years) had larger lateral (d = 0.46), pulvinar (d = 0.33), ventral (d = 0.35) and whole thalamus (d = 0.40) volumes at unadjusted p-values <0.05. Adolescent patients showed no volumetric differences. Adult OCD patients compared with controls had smaller volumes across all subregions (anterior, lateral, pulvinar, medial, and ventral) and smaller whole thalamic volume (d = -0.15 to -0.07) after multiple comparisons correction, mostly driven by medicated patients and associated with symptom severity. The anterior thalamus was also significantly smaller in patients after adjusting for thalamus size. Our results suggest that OCD-related thalamic volume differences are global and not driven by particular subregions and that the direction of effects are driven by both age and medication status.
© 2022. The Author(s).
Conflict of interest statement
Alan Anticevic is a shareholder and member of the technology advisory board for RBNC Therapeutics. Jamie D. Feusner is affiliated with NOCD, LLC; Prof. Mataix-Cols receives personal fees from UpToDate, Inc and Elsevier, both outside the current work; Pedro Morgado has received in the past 3 years grants, CME-related honoraria, or consulting fees from Angelini, AstraZeneca, Bial Foundation, Biogen, DGS-Portugal, FCT, FLAD, Janssen-Cilag, Gulbenkian Foundation, Lundbeck, Springer Healthcare, Tecnimede and 2CA-Braga; Erika L. Nurmi served on the Scientific Advisory Board of Myriad Genetics and Medical Advisory Board of Tourette Association of America and Teva Pharmaceuticals; Christopher Pittenger is a consultant for Biohaven, CH-TAC, Lundbeck (not relevant to this work); in the last 3 years, Dr. Simpson has received research support from Biohaven for a multi-site clinical trial, royalties from Cambridge University Press and UpToDate, Inc, and a stipend from the American Medical Association for serving as Associate Editor of JAMA-Psychiatry; Susanne Walitza received no funds of Industry Outside professional activities and interests are declared under the link of the University of Zurich
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- Fawcett EJ, Power H, Fawcett JM. Women are at greater risk of OCD than men: a meta-analytic review of OCD prevalence worldwide. J Clin Psychiatry. 2020;81. - PubMed
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