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Related Experiment Videos

Retinal waves are governed by collective network properties.

D A Butts1, M B Feller, C J Shatz

  • 1Physical Biosciences Division, Lawrence Berkeley National Laboratory, and the Department of Physics, University of California, Berkeley, California 94720-7300, USA. dbutts@physics.berkeley.edu

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|April 23, 1999
PubMed
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Developing retinal waves, crucial for neural connections, are robustly generated by immature networks. Local cell excitability determines wave properties, explaining varied propagation speeds observed in experiments.

Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Developmental Biology

Background:

  • Propagating neural activity in the developing mammalian retina is essential for forming retinothalamic connections.
  • This neural activity displays complex spatiotemporal patterns, including initiation, propagation, and termination.

Purpose of the Study:

  • To investigate the behavior of developing retinal activity using computational modeling.
  • To understand how spatiotemporal patterns of neural activity are robustly generated in immature retinal networks.

Main Methods:

  • Development of a computational model of the developing retina.
  • Utilizing simulation and analytic calculations to analyze model behavior.
  • Comparison of model predictions with experimental data from whole-cell voltage-clamp recordings.

Related Experiment Videos

Main Results:

  • The model successfully produced spatially and temporally restricted waves without relying on inhibition.
  • Robust generation of correlated, regular, and spatially restricted activity across a range of network parameters.
  • Identified the fraction of recruitable cells within a dendritic field as a key local determinant of wave properties.

Conclusions:

  • Immature neural networks can reliably generate complex spatiotemporal activity patterns crucial for circuit development.
  • Local network excitability, specifically the proportion of recruitable cells, dictates the propagation characteristics of retinal waves.
  • The model provides a framework for understanding how neural circuit organization leads to complex correlated activity.