Innate heuristics and fast learning support escape route selection in mice

Area of Science:

• Behavioral Neuroscience
• Animal Cognition
• Ecology

Background:

• Animals require rapid defensive actions to escape threats.
• Mice can quickly react to stimuli and use spatial memory for escape in simple settings.
• Natural environments present multiple escape routes, necessitating complex decision-making.

Purpose of the Study:

• To investigate how mice learn to select between different escape routes.
• To understand the role of innate heuristics and spatial learning in escape route selection.
• To determine if experience is necessary for choosing optimal escape paths.

Main Methods:

• Mice were observed in environments with varying escape path lengths and geometries.
• Behavioral responses to threatening stimuli were recorded.
• Computational modeling using model-based reinforcement learning was employed.

Main Results:

• Mice consistently preferred escape routes minimizing path distance and angle to shelter.
• This preference was evident from the first threat encounter after minimal exploration.
• Route selection was flexible and adaptable to changing environmental geometries.

Conclusions:

• Mice employ a combination of rapid spatial learning and innate heuristics for efficient escape route selection.
• Innate heuristics assign survival value to paths, reducing the need for costly trial-and-error learning.
• This adaptive strategy integrates evolved knowledge with experience for survival in dynamic environments.