Development and consistency of gait in the mouse

Area of Science:

• Neuroscience
• Biomechanics
• Developmental Biology

Background:

• Mouse models are vital for studying human diseases, many of which cause gait disturbances.
• Establishing normal gait development and adult characteristics in mice provides essential benchmarks for research.

Purpose of the Study:

• To characterize normal mouse gait development from early postnatal stages to adulthood.
• To identify the age at which adult gait patterns are established in mice.
• To provide normative data for evaluating disease models and therapeutic interventions.

Main Methods:

• Gait analysis using video techniques from postnatal day 13 to postnatal week 80.
• Measurement of velocity, stride, stance, and swing times.
• Analysis of vertical reaction force (Pz) using load cells from postnatal week 29 to 80.

Main Results:

• Some adult gait features are present by postnatal day 13, but hindlimb (HL) stride, stance, and swing relationships mature later.
• Forelimb (FL) gait characteristics develop earlier than HL.
• All measured gait parameters, including the FL stance/swing relationship, reach adult form by postnatal day 24 and remain consistent.
• In healthy adult mice, FL transmits approximately 5% more vertical reaction force than HL.

Conclusions:

• Normal mouse gait patterns are established relatively early in development (by postnatal day 24).
• These established patterns are maintained throughout adult life, providing a stable baseline.
• This study provides critical normative data for the use of mouse models in disease research and therapeutic testing.