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Surprises From the Basal Ganglia: Stop and Go Have New Meaning
1McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
New research suggests a revised basal ganglia model with parallel direct and indirect pathways. These striosome-based circuits may offer novel therapeutic strategies for movement disorders like Parkinson's disease.
Area of Science:
- Neuroscience
- Movement Disorders
- Basal Ganglia Function
Background:
- The canonical direct-indirect model explains basal ganglia's role in movement.
- Imbalances in these pathways are implicated in movement disorders.
Purpose of the Study:
- To propose a revision of the canonical basal ganglia model.
- To introduce the concept of parallel non-canonical pathways.
- To explore potential clinical applications for Parkinson's disease.
Main Methods:
- Perspective piece synthesizing recent research findings.
- Hypothetical model development based on emerging evidence.
Main Results:
- Evidence for a previously unappreciated pair of direct and indirect pathways.
- These non-canonical pathways parallel the canonical ones.
- Potential for improved clinical treatments for Parkinson's disease.
Conclusions:
- The canonical model requires revision.
- Non-canonical striosome-based pathways may act as homeostatic regulators.
- These findings offer new avenues for treating hyperkinetic and hypokinetic disorders.
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