Inter and intratrial variation in cat locomotor behavior.

Area of Science:

• Comparative biomechanics
• Animal locomotion analysis

Background:

• Understanding feline locomotion is crucial for interpreting studies involving induced lesions.
• Variability in gait parameters can provide insights into neural control mechanisms.

Purpose of the Study:

• To characterize variations in cat gait parameters (cycle, swing/stance durations, footfall patterns) during treadmill locomotion.
• To investigate the effects of training and speed on feline gait.
• To explore implications for comparative studies and neural control of locomotion.

Main Methods:

• Four cats were trained to walk on a treadmill at various speeds.
• Cats were filmed weekly for three weeks, with one cat filmed 35 days prior.
• Gait parameters including total cycle duration, swing/stance durations, and footfall patterns were analyzed.

Main Results:

• A 'training effect' (reduced cycle duration) was observed in only one cat.
• Limb footfall patterns showed slight, internally consistent variations across trials, often reciprocal between forelimbs.
• Gait variability was higher at slower speeds, with peak variability near the walk-trot transition.
• Swing and stance durations were modifiable, with swing duration being primary in galloping.

Conclusions:

• Feline locomotion exhibits training-dependent and speed-dependent variations.
• Gait variability is complex, influenced by speed and potentially limb interactions.
• Findings inform comparative locomotion studies and the neural control of feline movement.