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Long-term electrical capsular stimulation in patients with obsessive-compulsive disorder
Bart J Nuttin1, Loes A Gabriëls, Paul R Cosyns
1Department of Neurosurgery, Laboratory of Experimental Neurosurgery and Neuroanatomy, Catholic University of Leuven, University Hospitals Leuven, Herestraat 49, B-3000 Leuven, Belgium. bart.nuttin@uz.kuleuven.ac.be
Neurosurgery
|May 24, 2003
Summary
Chronic electrical capsular stimulation effectively reduced obsessive-compulsive disorder symptoms for over 21 months in severe cases. This brain stimulation offers a promising alternative to irreversible lesioning procedures for treatment-resistant patients.
Area of Science:
- Neurosurgery
- Psychiatry
- Neuroscience
Background:
- Obsessive-compulsive disorder (OCD) is a severe, long-standing psychiatric condition.
- Treatment-resistant OCD often necessitates invasive interventions.
- Lesioning procedures for OCD are irreversible and carry potential side effects.
Purpose of the Study:
- To evaluate the efficacy of chronic electrical capsular stimulation as an alternative to lesioning for severe, treatment-resistant OCD.
- To assess the long-term effects of capsular stimulation on core OCD symptoms.
Main Methods:
- Stereotactic implantation of quadripolar electrodes in the anterior limbs of the internal capsules in six OCD patients.
- Double-blind clinical assessments by psychiatrists and psychologists.
- A blinded random crossover design was used to evaluate four patients undergoing continuous stimulation.
Main Results:
- Significant reduction in Yale-Brown Obsessive Compulsive Scale scores during stimulation (19.8) versus off (32.3).
- Sustained symptom reduction for at least 21 months.
- Decreased Clinical Global Severity scores and altered regional brain activity (increased pons signal, decreased frontal metabolism) observed via fMRI and PET scans.
Conclusions:
- Chronic electrical capsular stimulation effectively reduces core OCD symptoms in severe, long-standing, treatment-refractory cases.
- The procedure demonstrates sustained efficacy for up to 21 months post-surgery.
- Stimulation induces measurable changes in brain activity, supporting its therapeutic mechanism.