PUBLICATION
Spontaneous Neuronal Network Dynamics Reveal Circuit's Functional Adaptations for Behavior
- Authors
- Romano, S.A., Pietri, T., Pérez-Schuster, V., Jouary, A., Haudrechy, M., Sumbre, G.
- ID
- ZDB-PUB-150224-5
- Date
- 2015
- Source
- Neuron 85(5): 1070-85 (Journal)
- Registered Authors
- Pietri, Thomas, Romano, Sebastian, Sumbre, Germán
- Keywords
- none
- MeSH Terms
-
- Adaptation, Physiological/physiology*
- Animals
- Animals, Genetically Modified
- Nerve Net/physiology*
- Neurons/physiology*
- Photic Stimulation/methods*
- Superior Colliculi/physiology
- Visual Pathways/physiology*
- Zebrafish
- PubMed
- 25704948 Full text @ Neuron
Citation
Romano, S.A., Pietri, T., Pérez-Schuster, V., Jouary, A., Haudrechy, M., Sumbre, G. (2015) Spontaneous Neuronal Network Dynamics Reveal Circuit's Functional Adaptations for Behavior. Neuron. 85(5):1070-85.
Abstract
Spontaneous neuronal activity is spatiotemporally structured, influencing brain computations. Nevertheless, the neuronal interactions underlying these spontaneous activity patterns, and their biological relevance, remain elusive. Here, we addressed these questions using two-photon calcium imaging of intact zebrafish larvae to monitor the neuron-to-neuron spontaneous activity fine structure in the tectum, a region involved in visual spatial detection. Spontaneous activity was organized in topographically compact assemblies, grouping functionally similar neurons rather than merely neighboring ones, reflecting the tectal retinotopic map despite being independent of retinal drive. Assemblies represent all-or-none-like sub-networks shaped by competitive dynamics, mechanisms advantageous for visual detection in noisy natural environments. Notably, assemblies were tuned to the same angular sizes and spatial positions as prey-detection performance in behavioral assays, and their spontaneous activation predicted directional tail movements. Therefore, structured spontaneous activity represents "preferred" network states, tuned to behaviorally relevant features, emerging from the circuit's intrinsic non-linear dynamics, adapted for its functional role.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping