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Transient cortical circuits match spontaneous and sensory-driven activity during development.

Zoltán Molnár1, Heiko J Luhmann2, Patrick O Kanold3,4

  • 1Department of Physiology, Anatomy and Genetics, Sherrington Building, University of Oxford, Parks Road, Oxford OX1 3PT, UK. zoltan.moltan@dpag.ox.ac.uk luhmann@uni-mainz.de pkanold@jhu.edu.

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Early brain activity shapes developing cortical networks. Disruptions to this spontaneous activity, especially during early development, can lead to long-term neurological and psychiatric issues.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Computational Neuroscience

Background:

  • Spontaneous neural activity is crucial for synchronizing early brain networks.
  • These networks establish the foundation for thalamocortical connections and cortical architecture.
  • Sensory input refines these circuits once afferents reach the cortex.

Purpose of the Study:

  • To elucidate the role of spontaneous and sensory-driven activity in early cortical development.
  • To understand how early pathological insults impact cortical network formation.
  • To explore the link between early cortical dysfunction and later neurological/psychiatric conditions.

Main Methods:

  • Analysis of spontaneous and sensory-evoked neural activity patterns in developing cortical circuits.
  • Investigation of the function of subplate neurons in integrating early network activity.
  • Modeling of pathological conditions affecting early brain development.

Main Results:

  • Spontaneous activity synchronizes local and large-scale cortical networks, forming a template for future connectivity.
  • Subplate neurons are critical for integrating both spontaneous and sensory-driven activity.
  • Early pathological insults disrupt spontaneous activity, leading to cortical dysfunction and potential miswiring.

Conclusions:

  • The developing cortex relies on a precise interplay of spontaneous and sensory activity for proper network formation.
  • Early disruptions to this activity, caused by pathological insults, can have lasting consequences on brain structure and function.
  • Understanding these early developmental processes is key to addressing neurological and psychiatric disorders later in life.