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Acrobatic exercise recovers object recognition memory impairment in hypoxic-ischemic rats.

Wellington de Almeida1,2, Heloísa Deola Confortim1,3, Bruna Ferrary Deniz1,2

  • 1Programa de Pós-Graduação em Neurociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.

International Journal of Developmental Neuroscience : the Official Journal of the International Society for Developmental Neuroscience
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PubMed
Summary

Acrobatic exercises show promise in improving memory deficits and brain plasticity in neonatal hypoxia-ischemia (HI) rodent models. While spatial memory was not fully restored, novel object recognition improved, suggesting functional recovery potential.

Keywords:
coordination trainingdevelopmental brain disordermotor skill learningneural developmentperinatal asphyxia

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Exercise Physiology

Background:

  • Neonatal hypoxia-ischemia (HI) is a critical condition causing significant cognitive and motor impairments.
  • Acrobatic exercises (AE) are explored for motor deficit management, but their cognitive impact post-HI remains unclear.
  • Understanding AE's effects on brain plasticity markers is crucial for therapeutic development.

Purpose of the Study:

  • To investigate the efficacy of an acrobatic exercise protocol on memory impairments in a rodent model of neonatal hypoxia-ischemia (HI).
  • To assess the impact of AE on key neuroplasticity markers, including BDNF and synaptophysin, in brain regions affected by HI.
  • To evaluate the potential of AE as a therapeutic strategy for cognitive and motor dysfunction following neonatal HI.

Main Methods:

  • A Rice-Vannucci rodent model was used, inducing HI on postnatal day 7 (PND7).
  • Post-weaning (PND22), rats underwent a 5-week acrobatic exercise (AE) protocol.
  • Cognitive function was assessed using novel object recognition (NOR) and Morris Water Maze (WM) tests, alongside analysis of hippocampal and striatal neuroplasticity markers.

Main Results:

  • AE treatment led to significant recovery in novel object recognition (NOR) memory performance in HI rats.
  • Spatial memory, assessed by the Morris Water Maze (WM), did not show significant improvement after AE.
  • Neuroplasticity markers revealed alterations: hippocampal BDNF increased ipsilaterally, striatal BDNF decreased contralaterally, and synaptophysin was maintained despite tissue volume reduction.

Conclusions:

  • Acrobatic exercises demonstrate a capacity to promote functional recovery and improve certain cognitive functions, like NOR memory, in neonatal HI models.
  • The observed changes in BDNF and synaptophysin suggest AE-induced neuroplastic alterations in the hippocampus and striatum.
  • While promising, further research is needed to elucidate the specific neuroplastic pathways underlying AE's therapeutic effects in HI survivors.