New behavioral protocols to extend our knowledge of rodent object recognition memory

Area of Science:

• Neuroscience
• Animal Behavior
• Cognitive Psychology

Background:

• Animals exhibit a natural inclination towards novelty, crucial for exploration and learning.
• Standard object recognition tasks for rodents have limitations.
• A new
• bow-tie maze
• task integrates delayed nonmatching-to-sample with spontaneous exploration.

Purpose of the Study:

• To evaluate the efficacy of the novel bow-tie maze for object recognition tasks.
• To investigate object recognition in rats and mice using this new paradigm.
• To explore factors influencing object recognition, including sensory cues and neural substrates.

Main Methods:

• Two rat strains (Lister Hooded, Dark Agouti) and mice were tested in the bow-tie maze.
• Experiments involved varying light conditions and assessing performance after hippocampal/fornix lesions.
• Forgetting curves were derived from within-session and between-session trials.

Main Results:

• Both rat strains demonstrated reliable object recognition, with Lister Hooded rats performing superiorly.
• The task proved effective in both light and dark conditions, suggesting multimodal cue involvement.
• Hippocampal or fornix lesions did not impair performance on the basic task, unlike perirhinal cortex lesions.

Conclusions:

• The bow-tie maze is a versatile and effective tool for studying object recognition memory.
• The findings highlight the role of tactile and olfactory cues in object recognition.
• This task advances the understanding of memory consolidation and forgetting in rodents and mice.