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Environmental Context Modulates Habituation of Visually Evoked Defensive Behavior
Haoxuan Qi1, Alice Treloar1, Greg J Stuart2,3
1Eccles Institute of Neuroscience, John Curtin School of Medical Research, Australian National University, Canberra, ACT 2601, Australia.
Eneuro
|June 2, 2026
Summary
Animals can habituate to visual threats, but this learned suppression of defensive behaviors like freezing is context-dependent. Changing the environment can quickly reinstate fear responses, showing behavioral flexibility.
Area of Science:
- Neuroscience
- Ethology
- Behavioral Biology
Background:
- Innate defensive behaviors, such as freezing, are crucial for animal survival against threats.
- Habituation, the filtering of irrelevant stimuli, conserves energy but its role in innate defensive behaviors is less understood.
- Environmental context is known to influence associative learning, but its impact on innate visual threat responses is unclear.
Purpose of the Study:
- To investigate the role of environmental context in the habituation of visually evoked defensive behaviors in mice.
- To determine if habituation to predator-like visual stimuli is context-dependent.
Main Methods:
- Developed a protocol for rapid and stable habituation of freezing responses to simulated aerial predator stimuli in mice.
- Tested habituation in different environmental contexts to assess context-dependency.
- Measured freezing behavior as an indicator of defensive response.
Main Results:
- Habituation of freezing responses was rapid (minutes) and stable (over a week).
- Changing the environmental context significantly and reversibly reduced habituation, reinstating freezing behavior.
- Re-testing in the original context restored habituated levels of freezing.
Conclusions:
- Environmental context critically shapes the habituation of visually evoked innate defensive behaviors.
- This demonstrates significant flexibility in a conserved survival mechanism.
- Context is vital for regulating responses to visual threats.
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