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Analysis of Electrocardiograms and Behavior in Mice from Pregnancy to Lactation Period
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Area postrema undergoes dynamic postnatal changes in mice and humans.

Hamza Numan Gokozan1, Faisal Baig1, Sarah Corcoran1

  • 1The Ohio State University, College of Medicine, Department of Pathology, Division of Neuropathology, Columbus, Ohio, 43210.

The Journal of Comparative Neurology
|September 25, 2015
PubMed
Summary

The area postrema, vital for autonomic nervous system (ANS) functions, shows delayed postnatal development in mice. Its volume and neuronal connections significantly increase between postnatal days 7-20, not earlier.

Keywords:
PHOX2Barea postremaautonomic nervous systemcircumventriculate organinteroceptionpostnatal development

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Autonomic Nervous System Research

Background:

  • The postnatal period is critical for mammalian autonomic nervous system (ANS) development.
  • The area postrema is a key ANS structure regulating vital functions like temperature, breathing, and satiety.

Purpose of the Study:

  • To investigate the postnatal developmental trajectory of the area postrema.
  • To characterize the maturation of neuronal circuitry within the area postrema.

Main Methods:

  • Utilized transgenic mouse models to trace neuronal connections.
  • Analyzed changes in area postrema volume and synaptic input over specific postnatal periods.

Main Results:

  • The area postrema exhibits a delayed maturation, with no significant changes observed from postnatal days 0-7.
  • Significant increases in area postrema volume and PHOX2B-derived neuronal synaptic input occur between postnatal days 7-20.
  • An established ANS scaffold exists early in embryonic development, preceding delayed area postrema maturation.

Conclusions:

  • Key autonomic nervous system structures undergo dynamic postnatal developmental changes.
  • The delayed maturation of the area postrema provides insights into ANS dysfunction and disease risks in infants.