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Developmental Modes and Developmental Mechanisms can Channel Brain Evolution.

Christine J Charvet1, Georg F Striedter

  • 1Department of Neurobiology and Behavior, Center for the Neurobiology of Learning and Memory, University of California Irvine, CA, USA.

Frontiers in Neuroanatomy
|March 4, 2011
PubMed
Summary
This summary is machine-generated.

Altricial development in parrots and songbirds, unlike precocial ducks and geese, may facilitate larger telencephalons. Delayed neurogenesis in altricial birds could promote neural adaptations for learning and vocalizations.

Keywords:
birddevelopmentevolutionmodeproliferation

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The Mouse Hindbrain As a Model for Studying Embryonic Neurogenesis
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Published on: January 29, 2018

Area of Science:

  • Comparative neuroanatomy
  • Evolutionary developmental biology
  • Avian biology

Background:

  • Anseriform birds (ducks, geese), parrots, and songbirds exhibit disproportionately enlarged telencephalons compared to other avian species.
  • Parrots and songbirds are altricial (young require parental care), while anseriforms are precocial (young are self-sufficient).

Purpose of the Study:

  • To investigate how different developmental modes (precocial vs. altricial) influence brain development mechanisms.
  • To explore the role of developmental timing in the evolution of telencephalic size and complexity in birds.

Main Methods:

  • Comparative analysis of avian developmental strategies.
  • Hypothesizing the impact of developmental timing on neurogenesis and neural circuit evolution.

Main Results:

  • Altriciality is proposed to facilitate telencephalic expansion by delaying telencephalic neurogenesis.
  • Delayed neurogenesis may lead to delayed maturation, fostering neural adaptations for enhanced learning capabilities.

Conclusions:

  • Developmental modes significantly influence the evolution of telencephalon size in birds.
  • Delayed neurogenesis in altricial birds is hypothesized as a prerequisite for the evolution of complex learned behaviors, such as vocalizations.