Related Experiment Video
Updated: Mar 26, 2026
10:35
Two-photon Calcium Imaging in Neuronal Dendrites in Brain Slices
Published on: March 15, 2018
11.8K
Correlated Synaptic Inputs Drive Dendritic Calcium Amplification and Cooperative Plasticity during Clustered Synapse
Kevin F H Lee1, Cary Soares1, Jean-Philippe Thivierge2
1Neuroscience Graduate Program, University of Ottawa, Ottawa, ON K1H 8M5, Canada; Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada.
Neuron
|February 9, 2016
Summary
Scientists discovered a calcium signaling mechanism that guides synapse formation in the brain. This process uses NMDA receptor activation and intracellular calcium release to strengthen connections between active, neighboring neurons during development.
Area of Science:
- Neuroscience
- Developmental Biology
- Synaptic Plasticity
Background:
- Understanding the mechanisms guiding synaptic connectivity is crucial for comprehending neural circuit assembly.
- Activity-dependent calcium signaling plays a key role in synaptic development and plasticity.
Purpose of the Study:
- To investigate the role of NMDA receptor activation and intracellular calcium release in shaping synaptic connectivity during development.
- To elucidate the spatiotemporal dynamics of calcium signals during synaptogenesis and their impact on plasticity.
Main Methods:
- Whole-cell electrophysiology
- Two-photon calcium imaging
- Glutamate uncaging in hippocampal slices
Main Results:
- A functional coupling between NMDA receptor activation and ryanodine-sensitive calcium release was identified.
- This calcium amplification mechanism preferentially detected spatially clustered and temporally correlated synaptic inputs.
- Evidence of a local cooperative plasticity rule between coactive synapses and clustering of synaptic weights was observed.
Conclusions:
- Developmentally regulated calcium dynamics, driven by NMDA receptors, facilitate the formation of specific synaptic connections.
- This mechanism promotes spatially guided synapse maturation and contributes to the organization of emerging neural networks.
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