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Related Experiment Video

Updated: Jun 15, 2025

Contextual and Cued Fear Conditioning Test Using a Video Analyzing System in Mice
19:32

Contextual and Cued Fear Conditioning Test Using a Video Analyzing System in Mice

Published on: March 1, 2014

51.4K

Tracking Conditioned Fear in Pair-Housed Mice Using Deep Learning and Real-Time Cue Delivery.

Hannah C Smith1, Zhe Yu1, Patrick Yazigi1

  • 1Departments of Neuroscience and Pharmacology & Physiology, George Washington University, Washington, DC 20052.

Biorxiv : the Preprint Server for Biology
|June 4, 2025
PubMed
Summary

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This study introduces a new method using AI and video analysis to study fear responses in mice, offering insights into post-traumatic stress disorder (PTSD) and sensory reactivity.

Area of Science:

  • Neuroscience
  • Behavioral Science
  • Artificial Intelligence

Background:

  • Post-traumatic stress disorder (PTSD) is a prevalent condition characterized by heightened physiological reactivity to trauma cues.
  • Current pre-clinical models need to better integrate sensory physiology with behavioral analysis for understanding complex PTSD.
  • Investigating fear conditioning and extinction requires ethologically relevant environments and precise behavioral measurement.

Purpose of the Study:

  • To develop and validate a novel Pavlovian-based paradigm for assessing fear behaviors in pair-housed mice.
  • To integrate open-source software and deep learning for automated analysis of conditioned fear responses.
  • To examine the effects of recurrent conditioned stimuli on fear behaviors, extinction learning, and sex differences in a home cage environment.
Keywords:
FreezingHome CagePTSDPavlovian fear conditioning

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Related Experiment Videos

Last Updated: Jun 15, 2025

Contextual and Cued Fear Conditioning Test Using a Video Analyzing System in Mice
19:32

Contextual and Cued Fear Conditioning Test Using a Video Analyzing System in Mice

Published on: March 1, 2014

51.4K
Trace Fear Conditioning in Mice
07:02

Trace Fear Conditioning in Mice

Published on: March 20, 2014

32.8K
Fear Incubation Using an Extended Fear-Conditioning Protocol for Rats
13:38

Fear Incubation Using an Extended Fear-Conditioning Protocol for Rats

Published on: August 22, 2020

8.2K

Main Methods:

  • A novel Pavlovian conditioning paradigm was implemented in pair-housed mice within their home cage.
  • Deep learning-based pose estimation and open-source software were used for simultaneous video recording and analysis of freezing behavior.
  • CS-evoked freezing, extinction learning, and startle reactivity were assessed, considering circadian cycles and sex differences.

Main Results:

  • Fear-conditioned mice exhibited significant CS-evoked freezing and demonstrated extinction learning over the 2-week paradigm.
  • Females showed reduced freezing compared to males, with distinct circadian patterns of freezing behavior.
  • Males exhibited heightened startle reactivity, while both sexes displayed heightened context-dependent freezing post-paradigm.

Conclusions:

  • The developed software application enables precise, automated analysis of conditioned fear and defensive behaviors in an ethologically relevant setting.
  • This paradigm facilitates the study of sensory threat reactivity and sex differences in fear responses.
  • Findings contribute to a better understanding of neural circuits involved in PTSD and may inform future treatment strategies.