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The development of skilled walking in the rat
Alexandra M Shriner1, Felicia R Drever, Gerlinde A Metz
1Canadian Centre for Behavioural Neuroscience, University of Lethbridge, 4401 University Drive, Lethbridge, AB, Canada.
Behavioural Brain Research
|August 8, 2009
Summary
Rat pups develop skilled walking abilities through distinct developmental stages. Motor behaviors mature significantly between postnatal days 15-19, with full gait maturation by day 27.
Area of Science:
- Neuroscience
- Developmental Biology
- Animal Behavior
Background:
- Rats are altricial, requiring extensive postnatal development.
- Understanding motor development is key to studying motor system maturation.
- Skilled movement analysis provides insights into neurodevelopmental timelines.
Purpose of the Study:
- To qualitatively analyze the developmental progression of skilled walking in rat pups.
- To identify distinct stages of locomotor development using a novel rung bridge task.
- To establish a timeline for motor behavior maturation in early life.
Main Methods:
- A rung bridge task was employed to assess rat pups' motor capabilities.
- Ten rat pups were filmed daily from postnatal day 7 to 30.
- Ambulatory movements were analyzed frame-by-frame, evaluating 7 categories and 24 subcategories of motor behavior.
Main Results:
- Six distinct stages of locomotor development were identified.
- Significant gait pattern transformation occurred between postnatal days 15 and 19.
- Complete maturation of all observed motor behaviors was achieved by postnatal day 27.
Conclusions:
- Locomotor development in rats follows a predictable, staged progression.
- The findings provide a normative timeline for motor maturation in rat pups.
- This developmental framework is relevant for studying the impact of brain damage on motor skills.
