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Novel Object Recognition Test for the Investigation of Learning and Memory in Mice
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Running Improves Pattern Separation during Novel Object Recognition.

Leoni Bolz1, Stefanie Heigele1, Josef Bischofberger1

  • 1Department of Biomedicine, University of Basel, Pestalozzistr, Basel, Switzerland.

Brain Plasticity (Amsterdam, Netherlands)
|May 17, 2018
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Summary
This summary is machine-generated.

Voluntary running enhances pattern separation in mice, particularly for similar objects after a 24-hour delay. This physical exercise improves memory recall by boosting hippocampal neurogenesis.

Keywords:
Adult neurogenesisgranule cell dendriteshippocampuslearning and memorynovel object recognition

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Area of Science:

  • Neuroscience
  • Behavioral Science
  • Exercise Physiology

Background:

  • Running is known to increase adult neurogenesis and improve memory in tasks involving emotional bias.
  • The impact of running on pattern separation in spontaneous behaviors, free from emotional reinforcement, remains largely unexplored.

Purpose of the Study:

  • To investigate the effect of voluntary running on pattern separation during novel object recognition in mice.
  • To determine if physical exercise enhances memory for similar versus dissimilar objects without emotional bias.

Main Methods:

  • Mice were divided into running and sedentary groups.
  • Novel object recognition task was employed using relatively similar and substantially different objects.
  • Memory performance was assessed at short (1.5-hour) and long (24-hour) delays.

Main Results:

  • Running increased hippocampal neurogenesis but did not affect object recognition memory at a 1.5-hour delay.
  • At a 24-hour delay, running significantly improved recognition memory for similar objects.
  • Highly dissimilar objects were recognized by both running and sedentary mice at the 24-hour delay.

Conclusions:

  • Physical exercise, specifically voluntary running, improves pattern separation independent of emotional reinforcement.
  • Running enhances hippocampal function, leading to better temporal preservation of object distinctions and improved memory recall.