Conditioned Fear Behavior Test
Objective: Assessment of fear-induced behaviors including freezing/crouching in rats exposed to a context previously paired with footshock, and mapping neural substrates of conditioned fear through c-fos expression analysis
This is a Conditioned Fear Behavior Test protocol using rat as the model organism. The procedure involves 6 procedural steps, 2 equipment items, 1 materials. Extracted from a 1995 paper published in Journal of Neuroscience.
Model and subjects
rat • Not specified • unknown • Not specified • Not specified
Study window
Estimated timing pending
Core workflow
Conditioning procedure • Test session - Exposure to conditioned context • Behavioral observation
Primary readouts
- Frequency of crouching (freezing) behavior during exposure to conditioned context
- Number of Fos-like immunoreactive neurons in brain regions
- Dose-dependent effects of diazepam on freezing behavior
- Dose-dependent effects of diazepam on conditioned stress-induced c-fos expression
Key equipment and reagents
Use this page as an execution guide, then fall back to the source paper whenever you need exact exclusions, dosing details, or assay-specific caveats.
Confirm first
- Verify the animal model, intervention setup, and collection timepoints against the source paper.
- Check that every direct vendor link matches the exact specification your lab plans to run.
Use the page like this
- Work through the protocol steps in order and use the inline vendor chips only when you need to source or verify an item.
- Jump to Experimental Context for readouts, data shape, and analysis flow before planning downstream analysis.
Protocol Steps
Start here. The step list is optimized for running the experiment, with direct vendor links available inline when you need to source a cited item.
Conditioning procedure
Rats received footshock in a specific environment to establish classical conditioning
Note: This establishes the aversively conditioned contextual cues
View evidence from paper
“the environment in which they had previously received footshock”
Test session - Exposure to conditioned context
Rats were exposed to the environment in which they had previously received footshock
Note: Behavioral analysis was performed during this exposure to assess fear-induced behaviors
View evidence from paper
“Exposure to the environment in which they had previously received footshock significantly increased the number of Fos-like immunoreactive neurons”
Behavioral observation
Analysis of behaviors emitted by rats during test session, specifically measuring frequency of crouching (freezing) behavior
Note: Provided strong evidence that conditioning procedure was effective
View evidence from paper
“Analysis of the behaviors emitted by the rats during the test session provided strong evidence that the conditioning procedure was effective”
Diazepam pretreatment experiment
In a second experiment, rats received pretreatment with diazepam at doses of 2.5, 5.0, or 10 mg/kg prior to exposure to conditioned context
Note: Evaluated effects of anxiolytic drug on fear-induced behaviors and c-fos expression
View evidence from paper
“In a second experiment, the effects of pretreatment with the anxiolytic drug diazepam (2.5, 5.0, or 10 mg/kg) were evaluated”
Behavioral measurement with diazepam
Measurement of crouching (freezing) frequency in diazepam-pretreated rats exposed to conditioned context
Note: Benzodiazepine produced dose-related decreases in freezing behavior
View evidence from paper
“The benzodiazepine produced dose-related decreases in the frequency of crouching (freezing) elicited by the aversively conditioned contextual cues”
Immunohistochemistry and neural mapping
Analysis of Fos-like immunoreactive neurons in brain tissue to map neural substrates of conditioned fear and effects of diazepam
Note: Examined approximately 60 brain structures including cortical and subcortical regions
View evidence from paper
“The synthesis of Fos, the protein product of the immediate early gene c-fos, was used to map metabolically some of the neural substrates of conditioned fear in the rat”