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A Local Rebalancing Act Leads to Global Benefit
1Department of Molecular, Cell and Developmental Biology, University of California, Santa Cruz, Santa Cruz, CA 95064, USA.
Neuron
|November 18, 2017
Summary
Sensory deprivation in mice causes dendritic spine enlargement, balancing recent spine loss on the same branch. This branch-specific homeostatic plasticity shows dendritic branches are key computational units in the visual cortex.
Area of Science:
- Neuroscience
- Cellular biology
Background:
- Sensory experience shapes neural circuits.
- Homeostatic plasticity mechanisms maintain neural function.
Purpose of the Study:
- To investigate homeostatic plasticity in the visual cortex of sensory-deprived mice.
- To determine the role of dendritic branches in neural computation.
Main Methods:
- In vivo two-photon calcium imaging in awake, behaving mice.
- Analysis of dendritic spine dynamics in response to sensory deprivation.
Main Results:
- Dendritic spine enlargement was observed in sensory-deprived mice.
- This enlargement correlated with recent spine loss on the same dendritic branch.
- Evidence for branch-specific homeostatic plasticity was found.
Conclusions:
- Dendritic branches act as critical computational units.
- Homeostatic plasticity at the dendritic branch level is crucial for maintaining neural function under altered sensory conditions.
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