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Updated: May 5, 2026
11:17
Extinction Training During the Reconsolidation Window Prevents Recovery of Fear
Published on: August 24, 2012
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Putting the brakes on fear
1Department of Psychology and Institute for Neuroscience, Texas A&M University, College Station, TX 77843-3474, USA.
Neuron
|November 26, 2013
Summary
Fear extinction involves inhibitory processes in the amygdala. Trouche et al. demonstrate that basal amygdala neurons active during fear conditioning are silenced by local inhibitory interneurons post-extinction.
Area of Science:
- Neuroscience
- Behavioral Neuroscience
- Fear Memory
Background:
- Fear extinction is a learning process that reduces fear responses.
- Inhibitory processes within the amygdala are crucial for fear extinction.
- The specific neural circuits mediating this inhibition are not fully understood.
Purpose of the Study:
- To investigate the role of local inhibitory interneurons in silencing fear-related neurons in the basal amygdala during fear extinction.
- To elucidate the circuit mechanisms underlying the suppression of fear memories.
Main Methods:
- Utilized in vivo calcium imaging and optogenetic manipulation in rodents.
- Targeted specific neuronal populations in the basal amygdala during fear conditioning and extinction paradigms.
Main Results:
- Identified basal amygdala neurons that were activated during fear conditioning.
- Demonstrated that these fear-related neurons are subsequently silenced by local inhibitory interneurons following extinction.
- Showed that optogenetic activation of these interneurons mimics extinction-induced silencing.
Conclusions:
- Local inhibitory interneurons play a critical role in actively suppressing the activity of fear-related neurons in the basal amygdala during fear extinction.
- This silencing mechanism is a key component of the neural circuitry underlying the reduction of fear responses.
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