The sectored foraging field: a novel design to quantify spatial strategies, learning, memory, and emotion

Area of Science:

• Neuroscience
• Animal Behavior
• Cognitive Aging

Background:

• Norway rats exhibit social plasticity, with males often experiencing solitary adulthood.
• Social environments influence learning strategies, stress responses, and development.
• Understanding the interplay between social context, cognition, and emotion during aging is crucial.

Purpose of the Study:

• To investigate the effects of the social environment on cognition and emotion during aging in male rats.
• To analyze how different social housing conditions modulate spatial navigation strategies and stress reactivity.
• To assess the impact of social isolation versus group housing on cognitive performance and emotionality in aging rats.

Main Methods:

• Development of the sectored foraging field, a spatial navigation task with graded difficulty.
• Comparison of learning strategies (spatial vs. kinesthetic) in individually housed versus group-housed male Sprague-Dawley rats.
• Assessment of behavioral and cognitive responses to the removal of food and distal cues, measuring anxious alertness and performance.

Main Results:

• Individually housed males adopted a discernible spatial strategy, while group-housed males used an algorithmic kinesthetic strategy.
• Food and cue removal induced greater anxious alertness in group-housed males.
• Cognitive performance was impaired in group-housed rats but enhanced in isolated rats after cue removal.

Conclusions:

• Social housing significantly shapes learning strategies and emotional responses to stressors in aging male rats.
• Solitary housing may confer cognitive resilience in aging rats under specific stressful conditions.
• The sectored foraging field provides a valuable tool for studying the nuanced interactions between social environment, cognition, and emotion.