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Does subthalamic nucleus stimulation induce apathy in Parkinson's disease?
D Drapier1, S Drapier, P Sauleau
1Department of Psychiatry, Centre Hospitalier Guillaume Régnier, 108 Avenue du Général Leclerc, 35703 Rennes, France.
Journal of Neurology
|April 12, 2006
Summary
Subthalamic Nucleus Deep Brain Stimulation (STN-DBS) may worsen apathy in Parkinson's disease patients, despite improving motor symptoms. Researchers observed increased apathy scores post-surgery, suggesting a potential impact on the brain's limbic system.
Area of Science:
- Neuroscience
- Neurosurgery
- Psychiatry
Background:
- Subthalamic Nucleus Deep Brain Stimulation (STN-DBS) is effective for advanced Parkinson's disease (PD) motor symptoms.
- Non-motor effects of STN-DBS are less understood.
Purpose of the Study:
- To investigate the impact of STN-DBS on non-motor symptoms, specifically apathy, depression, and anxiety in PD patients.
- To explore potential mechanisms linking STN-DBS to changes in non-motor symptoms.
Main Methods:
- A cohort of 15 PD patients undergoing STN-DBS was assessed.
- Psychiatric symptoms (apathy, depression, anxiety) were evaluated pre-surgery and at 3 and 6 months post-surgery using standardized scales (AES, Starkstein, MADRS, AMDP).
Main Results:
- Apathy significantly worsened at 3 and 6 months post-STN-DBS compared to baseline.
- No significant changes were observed in depression or anxiety levels following STN-DBS.
Conclusions:
- STN-DBS may induce or exacerbate apathy in Parkinson's disease patients.
- This effect could be related to the diffusion of stimulation to the medial limbic areas of the subthalamic nucleus.