Toward a unified connectomic target for deep brain stimulation in obsessive-compulsive disorder
Ningfei Li, Juan Carlos Baldermann, Astrid Kibleur, Svenja Treu, Gavin J.B. Elias, Alexandre Boutet, Andres M. Lozano, Stephan Chabardes, Veerle Visser-Vandewalle, Mircea Polosan, Jens Kuhn, Andrea A. Kühn, Andreas Horn
Received Date: 13th April 19
Multiple surgical targets have been proposed for treating obsessive-compulsive disorder (OCD) with Deep brain stimulation (DBS). However, different targets may lie along the same fiber bundle, which could be responsible for clinical improvement. Here we analyzed data from two cohorts of OCD patients that underwent DBS to either the anterior limb of the internal capsule (ALIC) or the subthalamic nucleus (STN). Fiber tracts that were predominantly connected to electrodes in top or poor DBS responders – based on improvement on the Yale-Brown Obsessive-Compulsive Scale (Y-BOCS) – were isolated and each assigned a predictive value. Strikingly, the same fiber-bundle that was positively discriminative of treatment response emerged in both cohorts, independently from each other. Using this tract, it was feasible to cross-predict clinical improvement across DBS targets, cohorts and centers. Our results suggest that obsessive-compulsive symptoms could indeed be modulated by stimulation of this specific bundle and demonstrate that connectomics-derived improvement models informed by patients operated in one target may predict outcome in patients operated in an alternative target.
Read in full at bioRxiv.
This is an abstract of a preprint hosted on an independent third party site. It has not been peer reviewed but is currently under consideration at Nature Communications.