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February 19, 2026Development

Competitive and non-competitive rules govern activity-dependent axon arbor development in vivo

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Authors

LSLucía SalatinoMRMatías RodriguezPPPaola V. Plazas

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Overview

Researchers investigate how spontaneous electrical activity affects axon arbor development in zebrafish, highlighting key mechanisms.

Key Points

  • The study aims to explore how spontaneous electrical activity influences the development and maturity of axon arbors in sensory circuits.
  • Used larval zebrafish and the mechanosensory lateral line for investigation.
  • Suppressed electrical activity in specific neurons using an exogenous potassium channel.
  • Performed in vivo imaging to assess axon arbor characteristics.
  • Spontaneous electrical activity regulates territory and complexity of axon arbors.
  • Silenced arbors were more mobile and had lower varicosity density, indicating immaturity.
  • Demonstrated that arbor territory and branch changes are governed by competitive processes, while varicosity density is regulated independently of neighbor activity.

Cite This Study

Salatino et al. (2026) studied this question.

synapsesocial.com/papers/6996a788ecb39a600b3ed40ahttps://doi.org/10.1242/dev.205201
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Also Consider

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  5. 5Hebbian instruction of axonal connectivity by endogenous correlated spontaneous activity2024 · 19 citations