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Evolution of central pattern generators and rhythmic behaviours.

Paul S Katz1

  • 1Neuroscience Institute, Georgia State University, Atlanta, GA 30302-5030, USA pkatz@gsu.edu.

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
|November 25, 2015
PubMed
Summary
This summary is machine-generated.

The evolution of rhythmic behaviors and central pattern generators (CPGs) reveals that neural mechanisms can change independently of behavior. Natural selection can act separately on behavior and its underlying neural circuits.

Keywords:
comparativehomologous neuronshomoplasymotor patternneural circuitneuromodulation

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Area of Science:

  • Neuroscience
  • Evolutionary Biology
  • Behavioral Science

Background:

  • Rhythmic movements are controlled by central pattern generators (CPGs).
  • Evolutionary history shows gradual changes in behaviors and neural circuitry.
  • Behavioral divergence can arise from small genetic changes or large-scale neural rewiring.

Purpose of the Study:

  • To uncover principles about the evolution of behavior and neural circuits.
  • To understand the relationship between CPG evolution and behavioral divergence.
  • To explore how natural selection acts on behavior and neural mechanisms.

Main Methods:

  • Comparative analysis of rhythmic movements and CPGs across animal lineages.
  • Examination of genetic regulation's role in neural circuit divergence.
  • Study of analogous rhythmic behaviors evolved independently.

Main Results:

  • CPG divergence can occur without behavioral change.
  • Independent evolution of analogous rhythmic behaviors often involves different neural mechanisms.
  • Repeated evolution of behaviors can result from parallel evolution or latent CPGs.

Conclusions:

  • Behavioral evolution and neural circuit evolution are not always tightly coupled.
  • Homologous neural components do not necessarily determine behavior.
  • Natural selection can operate independently on behavior and neural circuit organization.