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Related Experiment Video

Updated: Jun 3, 2025

Elevated Plus Maze for Mice
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Prelimbic Cortex Activity Predicts Anxiety-Like Behavior in the Elevated Plus Maze.

Marina A Smoak1,2, Karla J Galvan1,2, Daniel E Calvo3,4

  • 1Department of Biological Sciences, The University of Texas at El Paso, USA.

Biorxiv : the Preprint Server for Biology
|January 7, 2025
PubMed
Summary
This summary is machine-generated.

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The prelimbic cortex (PrL) shows increased activity when rats avoid anxiety-provoking situations. This suggests the PrL plays a role in emotional regulation and anxiety-related behaviors.

Area of Science:

  • Neuroscience
  • Behavioral Neuroscience

Background:

  • The medial prefrontal cortex (mPFC) is crucial for emotional regulation, with its dysfunction linked to anxiety disorders.
  • The prelimbic cortex (PrL) region of the mPFC is implicated in modulating anxiety-like behaviors, but its exact function is debated.

Purpose of the Study:

  • To investigate the role of PrL neuronal activity in anxiety-like behavior using in vivo calcium imaging.
  • To determine if PrL activity correlates with avoidance behaviors in a standard anxiety test.

Main Methods:

  • Endoscopic in vivo calcium imaging was employed to monitor PrL neuronal activity in male and female Sprague-Dawley rats.
  • Rats were assessed using the Elevated Plus Maze (EPM), a validated behavioral paradigm for measuring anxiety.

Main Results:

Keywords:
GCaMP6sanxietycalcium imagingmPFC (medial prefrontal cortex)prelimbic cortexrats

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Last Updated: Jun 3, 2025

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  • A positive correlation was observed between higher PrL neuronal activity in the open arms of the EPM and reduced time spent in these arms.
  • This suggests that heightened PrL activity is associated with increased anxiety or avoidance behaviors.

Conclusions:

  • The PrL region of the mPFC appears to play a significant role in regulating emotional responses to anxiety-provoking stimuli.
  • PrL activity may influence an individual's tolerance for exposure to threatening environments, contributing to anxiety modulation.