Threat history controls flexible escape behavior in mice

Area of Science:

• Neuroscience
• Behavioral Biology
• Decision-Making Science

Background:

• External sensory stimuli guide behavioral responses, crucial for survival.
• Predator-avoidance behaviors like freezing and escape are key decision-making processes.
• The perceived threat value of environmental stimuli changes over time, requiring adaptive behavioral strategies.

Purpose of the Study:

• To investigate adaptive control of decision-making in response to threat.
• To probe the properties of threat escape behavior in laboratory mice (Mus musculus).
• To establish a model system for studying experience-dependent decision-making.

Main Methods:

• Developed an experimental paradigm to study threat escape in mice.
• Utilized visual looming stimuli to elicit escape responses.
• Assessed learned suppression of escape (LSE) persistence and specificity.

Main Results:

• Mice exhibited robust escape to visual looming stimuli after social isolation.
• Mice rapidly learned to suppress escape responses to non-threatening visual stimuli (LSE).
• LSE was robust, long-lasting, specific, and dependent on threat-escape history, not mere habituation.

Conclusions:

• Learned suppression of escape (LSE) is a robust, experience-dependent adaptive behavior.
• Action selection for escape is updated by recent threat history.
• LSE provides a valuable model for understanding the neurophysiology of adaptive decision-making.