Resolving anxiety-like behaviour inconsistencies in the elevated plus maze by tracking exploration depth and timing

Area of Science:

• Neuroscience
• Animal Behavior

Background:

• Anxiety-like behavior in rodents is typically assessed using the elevated plus maze.
• Conventional measures like arm entries and time spent in arms yield inconsistent results.
• This inconsistency questions the validity of current methods in capturing both exploration and avoidance.

Purpose of the Study:

• To introduce a novel measure, Novel Exploration Growth, for assessing anxiety-like behavior.
• To provide a more accurate and consistent method for quantifying rodent exploratory and avoidance motivations.
• To resolve inconsistencies arising from traditional elevated plus maze analysis.

Main Methods:

• Developed Novel Exploration Growth (NEG) to track the initial exploration of discrete maze areas over time.
• Analyzed the absolute amount and temporal patterns of novel exploration.
• Quantified both avoidance and exploratory behaviors within a single time-series measure.

Main Results:

• Novel Exploration Growth successfully captures both exploratory and avoidance behaviors.
• This new measure reveals distinct behavioral phenotypes.
• NEG provides a unified quantification of behaviors previously assessed inconsistently.

Conclusions:

• Novel Exploration Growth offers a superior estimation of anxiety-like behavior compared to conventional measures.
• This method addresses the dual motivations of exploration and avoidance inherent in elevated plus maze tasks.
• Resolves inconsistencies in anxiety-like behavior research, enhancing validity and reliability.