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Thalamic neuronal specification and early circuit formation.

Henrik Gezelius1, Guillermina López-Bendito1

  • 1Instituto de Neurociencias de Alicante, Universidad Miguel Hernández-Consejo Superior de Investigaciones Científicas (UMH-CSIC), Avenida Ramón y Cajal, s/n, Sant Joan d'Alacant, Spain.

Developmental Neurobiology
|October 15, 2016
PubMed
Summary

This review details the developmental origins of thalamic nuclei and neurons, from embryonic patterning to postnatal development. It highlights key guidance processes for establishing thalamocortical connections and future research directions.

Keywords:
axon guidancebraindevelopmentdifferentiationgene expressionneuronal specificationthalamus

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Neuroanatomy

Background:

  • The thalamus relays sensory/motor information to the cortex and is crucial for intracortical communication.
  • Thalamic nuclei comprise distinct glutamatergic projection neurons with specific connectivity and functions.
  • While adult thalamic nuclei have clear boundaries, their developmental origins are still being uncovered.

Purpose of the Study:

  • To summarize current knowledge on the specification of distinct thalamic neurons and nuclei.
  • To review the developmental processes from early embryonic patterning to postnatal stages.
  • To provide an overview of guidance mechanisms for thalamocortical connections.

Main Methods:

  • Review of existing literature on thalamic development.
  • Synthesis of data on embryonic patterning and neuronal specification.
  • Analysis of guidance processes for thalamocortical axon projection.

Main Results:

  • Thalamic nuclei develop through specific embryonic patterning events.
  • Neuronal specification and circuit formation occur from embryonic to postnatal stages.
  • Topographical specification guides early thalamocortical connections.

Conclusions:

  • Understanding thalamic development is key to comprehending brain circuitry.
  • Guidance mechanisms are critical for establishing functional thalamocortical pathways.
  • Further research is needed to fully elucidate thalamic neuron and circuit development.