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Evolution of patterning systems and circuit elements for locomotion.

Heekyung Jung1, Jeremy S Dasen1

  • 1Howard Hughes Medical Institute (HHMI), NYU Neuroscience Institute, Department of Neuroscience and Physiology, New York University School of Medicine, New York, NY 10016, USA.

Developmental Cell
|February 25, 2015
PubMed
Summary
This summary is machine-generated.

Animal nervous system evolution is complex. This review explores how neural circuits, particularly those for vertebrate locomotion, emerged and diversified through evolutionary modifications, highlighting conserved signaling systems.

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Area of Science:

  • Neuroscience
  • Evolutionary Biology
  • Comparative Zoology

Background:

  • Animal nervous systems exhibit remarkable behavioral diversity driven by evolutionary adaptations.
  • Understanding the evolution of neural circuits is crucial but challenging.
  • Comparative studies show conserved early bilaterian nervous system patterning but diverse lineage-specific architectures.

Purpose of the Study:

  • To review the mechanisms behind the emergence and diversity of animal nervous systems.
  • To focus on the neural circuits controlling vertebrate locomotion.
  • To explore how neural circuit composition and architecture evolved.

Main Methods:

  • Comparative analysis of nervous system evolution.
  • Review of studies on neural circuit development and function.
  • Focus on conserved and divergent evolutionary pathways.

Main Results:

  • Early bilaterian nervous systems share conserved intrinsic signaling systems.
  • Significant diversity exists in neural circuit composition and architecture across animal lineages.
  • Specific mechanisms driving the evolution of vertebrate locomotion circuits are discussed.

Conclusions:

  • Evolutionary modifications of nervous systems are key to animal adaptation and behavioral diversity.
  • Conserved developmental pathways interact with lineage-specific changes to shape neural circuits.
  • Further research into specific circuits, like those for locomotion, can illuminate broader evolutionary principles.