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

Chandrashekhar D. Borkar; Jonathan P. Fadok

doi:10.3791/61536

Um novo paradigma de condicionamento do medo pavloviano para estudar o congelamento e o comportam...

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Behavior

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JoVE Journal Behavior

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

Um novo paradigma de condicionamento do medo pavloviano para estudar o congelamento e o comportamento de voo

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09:26 min

January 5, 2021

DOI: 10.3791/61536-v

Chandrashekhar D. Borkar^1,2, Jonathan P. Fadok^1,2

¹Department of Psychology,Tulane University, ²Tulane Brain Institute,Tulane University

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Overview

This study presents a classical conditioning paradigm designed to assess complex defensive behaviors in rodents, focusing on transitions between conditioned freezing and flight responses. Understanding these behaviors is essential for insights into anxiety, panic, and post-traumatic stress disorders.

Key Study Components

Area of Science

Neuroscience
Behavioral Psychology
Rodent Models

Background

Defensive behaviors are influenced by threat intensity, proximity, and context.
Classical conditioning can elucidate transitions in defensive responses.
This model is relevant for studying anxiety and related disorders.
Investigating these behaviors can lead to novel therapeutic approaches.

Purpose of Study

To assess complex defensive behavior in rodents.
To facilitate investigations into transitions between defensive behaviors.
To uncover mechanisms of defensive behavior related to PTSD and panic disorders.

Methods Used

Utilization of conditioned stimuli such as pure tone and white noise.
Defining inter-trial intervals presented pseudo-randomly.
Tracking mouse behavior in various contexts.
Adjusting parameters for software tracking of defensive responses.

Main Results

Clear transitions between freezing and flight behaviors were observed.
The protocol effectively elicited complex adaptive responses to threats.
Insights gained could inform therapeutic strategies for anxiety disorders.
Behavioral responses were reliably measured across trials.

Conclusions

This classical conditioning paradigm is a valuable tool for studying defensive behaviors.
Understanding these behaviors can enhance knowledge of anxiety-related pathologies.
The model may contribute to the development of new therapeutic interventions.

Frequently Asked Questions

What is the significance of this study?

This study provides insights into defensive behaviors in rodents, which can inform understanding of anxiety and PTSD.

How does the classical conditioning paradigm work?

It uses specific stimuli to elicit and measure transitions between freezing and flight responses in rodents.

What are the potential applications of this research?

The findings could aid in developing novel therapeutics for anxiety and panic disorders.

What types of stimuli are used in the experiments?

The study uses a ten-second pure tone and a ten-second white noise as conditioned stimuli.

How are the trials structured?

Trials are structured with pseudo-random inter-trial intervals to assess behavioral responses accurately.

As respostas comportamentais defensivas dependem da intensidade da ameaça, proximidade e contexto de exposição. Com base nesses fatores, desenvolvemos um paradigma de condicionamento clássico que provoca transições claras entre congelamento condicionado e comportamento de voo dentro de indivíduos. Esse modelo é crucial para a compreensão das patologias envolvidas em ansiedade, pânico e transtornos de estresse pós-traumático.

O objetivo geral desse paradigma é avaliar o comportamento defensivo complexo dos roedores. Esse protocolo é significativo porque facilita as investigações sobre as transições entre comportamentos defensivos, tornando-o ideal para pesquisadores interessados em estudar respostas adaptativas complexas à ameaça. Este protocolo usa estímulos de condição temporariamente precisos para provocar transição entre respostas defensivas, permitindo-nos estudar ambos, congelamento condicionado e comportamentos de voo dentro de indivíduos.

O uso desse modelo para descobrir os mecanismos do comportamento defensivo pode fornecer insights sobre disfunção relacionada ao TEPT e distúrbios do pânico e pode ajudar no desenvolvimento de novas terapêuticas. Para configurar os protocolos comportamentais, no programa, defina o SCS, definindo os estímulos a serem entregues como um tom puro de dez segundos, ou um ruído branco de dez segundos, e definindo os intervalos de inter-ensaio a serem apresentados pseudo-aleatoriamente após cada ensaio. Para configurar o rastreamento do software, coloque um mouse de teste em cada contexto relevante, defina o centro de gravidade e ajuste o tamanho do contorno.

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