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Self-Organized Attractor Dynamics in the Developing Head Direction Circuit.

Joshua P Bassett1, Thomas J Wills2, Francesca Cacucci1

  • 1Department of Neuroscience, Physiology and Pharmacology, University College London, Gower Street, London WC1E 6BT, UK.

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Summary
This summary is machine-generated.

Head direction (HD) cells provide spatial orientation. Early in development, their signals are unstable due to under-signaling head velocity, but geometric cues can stabilize them.

Keywords:
anterodorsal thalamic nucleusattractor networkdevelopmenthead direction cells

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Area of Science:

  • Neuroscience
  • Developmental Neuroscience
  • Spatial Navigation

Background:

  • Head direction (HD) cells form a critical network for spatial orientation.
  • HD cells are early-developing spatially modulated neurons but show instability before eye opening.
  • This instability is characterized by low directional information and unreliable firing patterns in young animals.

Purpose of the Study:

  • To characterize the instability of HD cell responses in developing rats.
  • To identify the source of this directional instability.
  • To investigate the role of environmental cues in stabilizing HD cell activity.

Main Methods:

  • Bayesian decoding of HD cell ensemble activity in the anterodorsal thalamic nucleus (ADN).
  • Analysis of HD cell responses in rat pups before eye opening.
  • Assessment of the impact of geometric cues on HD cell signal stability.

Main Results:

  • HD cell instability stems from under-signaling of angular head velocity.
  • Geometric cues, like environment corners, can mitigate under-signaling and stabilize HD cell direction.
  • Even unstable HD cell ensembles exhibit adult-like temporal and spatial couplings on short timescales.

Conclusions:

  • The neural circuitry for a functional HD network is present early in development.
  • HD cell network function is established before eye opening and independent of landmark referencing.
  • Under-signaling of head velocity is a key factor in early HD cell response instability.