A method for recording tendon strain in sheep during locomotion

Area of Science:

• Biomechanics
• Veterinary Medicine
• Musculoskeletal Research

Background:

• Understanding tendon strain during locomotion is crucial for diagnosing and treating musculoskeletal injuries in animals.
• The lateral digital extensor tendon's role in sheep locomotion requires detailed biomechanical analysis.

Purpose of the Study:

• To quantify strain changes in the lateral digital extensor tendon of sheep during locomotion.
• To correlate tendon strain patterns with muscle activity and limb kinematics.

Main Methods:

• A small metal strain gauge transducer was surgically implanted to measure tendon strain.
• Strain data was collected daily from 14 sheep over approximately 10 days.
• Measurements were correlated with observed muscle activity and limb position during locomotion.

Main Results:

• The primary period of tendon strain occurred immediately after muscle activity during foot placement.
• A secondary period of tendon tension was observed during foot lift-off, often linked to muscular contraction.
• Tendon strain patterns directly correlated with specific phases of the locomotion cycle and muscle activation.

Conclusions:

• Locomotion in sheep involves distinct phases of lateral digital extensor tendon strain.
• These strain patterns are closely associated with muscle activation and limb movement during walking.
• This study provides foundational biomechanical data on ovine digital tendon function during locomotion.