Measuring the strength of mice.

Area of Science:

• Neuroscience
• Animal Models
• Physiology

Background:

• The inverted screen test (1964) is a basic mouse muscle strength assessment.
• Existing commercial strength meters can be expensive and have limitations in grip design for mice.
• A need exists for a cost-effective and sensitive method to measure mouse muscular strength.

Purpose of the Study:

• To describe a novel, low-cost apparatus for measuring mouse grip and muscle strength.
• To provide a finer, more quantitative measure of muscular strength compared to the inverted screen test.
• To offer an accessible alternative to expensive commercial strength testing equipment.

Main Methods:

• Development of a simple apparatus using chain links of increasing length attached to a "fur collector" (wire mesh ball).
• Utilized the "fur collector" as a grip point for mice to lift weights.
• Evaluated the apparatus for its effectiveness in measuring grip strength and minimizing motivational factors.

Main Results:

• The apparatus proved effective for measuring mouse grip strength.
• The design, particularly the thinness of the "fur collector", allows for maximum grip exertion by mice.
• Motivational factors appear minimized in young adult mice using this setup.

Conclusions:

• The devised apparatus offers a cheap, simple, and sensitive method for assessing mouse muscle strength.
• This tool provides a valuable alternative for laboratories lacking specialized or expensive equipment.
• The design facilitates a pure test of strength, with high motivation observed in typical subjects.