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Published on: September 20, 2011
Climbing fibre-dependent changes in Golgi cell responses to peripheral stimulation
1Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK. wx202@cam.ac.uk
The Journal of Physiology
|August 30, 2008
Summary
Climbing fibers interacting with peripheral inputs can induce long-term depression of Golgi cell firing in the cerebellum. This plasticity may play a role in cerebellar motor learning.
Area of Science:
- Neuroscience
- Cerebellar Physiology
Background:
- Golgi cells regulate cerebellar information flow.
- Climbing fibers are known to influence Golgi cell activity.
Purpose of the Study:
- Investigate the impact of conjunctive stimulation of climbing fibers and peripheral afferents on Golgi cell responses.
- Examine the potential for synaptic plasticity in Golgi cells.
Main Methods:
- In vivo electrophysiological recordings in the cerebellar cortex.
- Conjunctive and non-synchronous stimulation of climbing fibers and peripheral afferents.
- Control experiments with single-input stimulation.
Main Results:
- Climbing fiber stimulation caused short-latency depression of Golgi cell firing.
- Conjunctive stimulation led to progressively developing, long-lasting depression of peripheral afferent-evoked Golgi cell responses.
- Non-synchronous stimulation did not alter Golgi cell responses, highlighting the importance of temporal conjunction.
Conclusions:
- Conjunctive stimulation of climbing fibers and peripheral inputs induces persistent, long-term changes in Golgi cell responses.
- This climbing fiber-mediated plasticity in Golgi cells may contribute to cerebellar motor learning.
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