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Related Concept Videos

Obsessive-Compulsive Disorder01:28

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Operant conditioning serves as a foundational principle in therapeutic interventions aimed at modifying maladaptive behaviors. Central to this approach is the notion that behaviors, both adaptive and maladaptive, are learned through reinforcement. By analyzing the environmental factors that reinforce problematic behaviors, clinicians can design interventions to weaken these reinforcements and replace maladaptive behaviors with healthier alternatives.
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Updated: May 15, 2025

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Deconstructing a common pathway concept for Deep Brain Stimulation in the case of Obsessive-Compulsive Disorder.

Volker A Coenen1,2,3, Mircea Polosan4, Thomas E Schläpfer5,6

  • 1Department of Stereotactic and Functional Neurosurgery, Medical Center of the University of Freiburg, Breisacher Straße 64, 79106, Freiburg, Germany. volker.coenen@uniklinik-freiburg.de.

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Summary

Deep Brain Stimulation (DBS) for treatment-resistant obsessive-compulsive disorder (TR-OCD) targets distinct brain sub-networks. The superolateral medial forebrain bundle (slMFB) is a key pathway, with the average OCD response tract (ORT) being part of it.

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Area of Science:

  • Neuroscience
  • Neurosurgery
  • Psychiatry

Background:

  • Deep Brain Stimulation (DBS) is a therapeutic option for treatment-resistant obsessive-compulsive disorder (TR-OCD).
  • The brain's obsessive-compulsive disorder (OCD) network involves interconnected sub-networks that are altered in disease and can be modulated by DBS.
  • Connectomic analyses of DBS data have identified specific fiber tracts responsible for anti-OCD effects.

Purpose of the Study:

  • To investigate the anatomical underpinnings of DBS efficacy in TR-OCD by correlating stimulation outcomes with activated tissue volumes.
  • To define the relationship between the superolateral medial forebrain bundle (slMFB), the average OCD response tract (ORT), and other relevant brain structures.
  • To explore the cortical sub-network connectivity associated with DBS targets in TR-OCD.

Main Methods:

  • Retrospective analysis of stimulation and outcome data from 26 TR-OCD patients who underwent DBS at two academic centers.
  • Anatomical overlay analysis correlating individual volumes of activated tissue (VAT) for anteromedial subthalamic nucleus (amSTN) and slMFB with OCD improvement.
  • Inspection of connectomic data (slMFB, ORT) for structural congruences and evaluation of cortical sub-network conjugations.

Main Results:

  • The average OCD response tract (ORT) was identified as a fiber selection within the superolateral medial forebrain bundle (slMFB).
  • DBS targeting amSTN and slMFB modulate distinct sub-networks, with amSTN DBS potentially influencing the slMFB.
  • Sub-network connections project to the dorsomedial prefrontal cortex (dmPFC), identified as a key hub.

Conclusions:

  • The slMFB is a dispersed pathway encompassing all OCD sub-networks and may serve as a common DBS target when stimulated near the ventral tegmental area.
  • While ORT is part of the slMFB, amSTN DBS's anti-OCD effects are not solely explained by ORT engagement.
  • The dorsomedial prefrontal cortex (dmPFC) is a significant conjugation point between OCD sub-networks.