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Updated: Oct 19, 2025

A Novel Pavlovian Fear Conditioning Paradigm to Study Freezing and Flight Behavior

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Published on: January 5, 2021

Predator Odor-induced Freezing Test for Mice.

Shintaro Otsuka¹

¹Department of Physiology, Keio University School of Medicine, Tokyo, Japan.

|September 20, 2021

Summary

This summary is machine-generated.

The innate fear response in mice can be studied using 2,4,5-trimethylthiazoline (TMT), a predator odor. This method details TMT exposure and freezing behavior analysis for innate fear research.

Keywords:

Fear Freezing Innate Odor Predator TMT

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Area of Science:

Neuroscience
Animal Behavior

Background:

The innate fear response is an unlearned emotional reaction.
2,4,5-trimethylthiazoline (TMT), a red fox anal secretion odorant, is a standard stimulus for innate fear studies.
TMT exposure reliably induces freezing behavior in rodents.

Purpose of the Study:

To provide a detailed protocol for exposing mice to TMT.
To outline methods for analyzing TMT-induced freezing behavior.
To facilitate reproducible research on innate fear responses.

Main Methods:

Mice are exposed to TMT odor.
Freezing behavior is quantified as a measure of fear response.
Detailed procedures for TMT administration and behavioral analysis are described.

Main Results:

Acute TMT exposure robustly induces freezing behavior in mice.
The described methods allow for consistent analysis of innate fear responses.
This protocol supports standardized investigation of fear mechanisms.

Conclusions:

The TMT-induced freezing test is a valuable tool for studying innate fear.
Standardized protocols are crucial for advancing our understanding of fear.
This work provides a practical guide for researchers in the field.