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High-frequency stimulation in Parkinson's disease: more or less?
Liliana Garcia1, Giampaolo D'Alessandro, Bernard Bioulac
1Laboratoire de neurophysiologie (Centre National de la Recherche Scientifique UMR 5543), Université de Bordeaux 2,146 rue Léo Saignat, 33076 Bordeaux Cedex, France.
Trends in Neurosciences
|April 6, 2005
Summary
High-frequency deep-brain stimulation (DBS) for movement disorders like Parkinson's disease involves two key mechanisms. It silences pathological brain activity and imposes beneficial upper gamma-band oscillations, improving motor symptoms.
Area of Science:
- Neurosurgery
- Neuroscience
- Movement Disorders
Background:
- High-frequency deep-brain stimulation (HFS) is a leading neurosurgical therapy for movement disorders.
- Common targets include the subthalamic nucleus (STN) and pallidal nuclei, with a recent preference for the STN.
Purpose of the Study:
- To elucidate the fundamental mechanisms underlying the therapeutic effects of HFS in movement disorders.
- To integrate recent experimental data to propose a dual mechanism of HFS action on the STN.
Main Methods:
- Review and interpretation of recent experimental data on HFS effects.
- Analysis of STN neuronal activity patterns during HFS.
Main Results:
- HFS employs a dual mechanism: 'less' (silencing pathological activity) and 'more' (imposing beneficial upper gamma-band oscillations).
- Both mechanisms are instrumental in alleviating motor symptoms.
Conclusions:
- The subthalamic nucleus's intrinsic capacity for oscillations is crucial for its function in health and disease.
- HFS leverages this capacity to switch between physiological and pathogenic discharge patterns.