Longitudinal evaluation of open field and string-pulling behaviors in mice

Area of Science:

• Neuroscience
• Behavioral Science
• Aging Research

Background:

• Spontaneous behaviors, like home base establishment and string-pulling, are organized movement sequences.
• Disruptions in these behaviors are seen in neurological disorders, but age effects are unknown.
• Understanding age-related changes is crucial for translating mouse models to human conditions.

Purpose of the Study:

• To longitudinally assess age-related changes in the organization of spontaneous behaviors in mice.
• To investigate how aging influences ambulatory (home base) and manipulatory (string-pulling) movement scales.
• To establish a baseline for studying age and other variables on spontaneous behaviors.

Main Methods:

• Longitudinal study of mice from 10 to 20 months of age.
• Analysis of open field movement (dark conditions) and string-pulling tasks.
• Evaluation of topographic and kinematic movement characteristics for organization assessment.

Main Results:

• Open field locomotion and home base stability remained largely unchanged with age.
• Heading and movement scaling in the open field showed age-dependent variations.
• String-pulling accuracy and kinematics generally improved with age, indicating no significant decline.

Conclusions:

• Spontaneous behaviors show minimal age-related decline in organization in mice up to 20 months.
• Age is a critical factor to consider when using mouse models for disease research.
• This study provides foundational data for future research on aging and spontaneous behaviors.