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Peroneus brevis is a more effective evertor than peroneus longus
James C Otis1, Jonathan T Deland, Samuel Lee
1The Hospital for Special Surgery, Department of Biomedical Mechanics and Materials, 535 East 70 Street, New York, NY 10021, USA. otisj@hss.edu
Foot & Ankle International
|May 11, 2004
Summary
The peroneus brevis tendon provides greater eversion than the peroneus longus, aiding in foot stability. This finding helps surgeons preserve crucial evertor function when tendons are compromised.
Area of Science:
- Orthopedics
- Biomechanics
- Anatomy
Background:
- The peroneus longus and brevis tendons are crucial for foot eversion, balancing opposing inversion forces.
- Surgical procedures may necessitate sacrificing or result in the loss of these tendons, impacting evertor function.
Purpose of the Study:
- To compare the evertor mechanisms of the peroneus brevis and peroneus longus tendons.
- To determine which tendon offers superior contribution to foot eversion and stability.
Main Methods:
- Utilized a cadaver model with six fresh-frozen foot-ankle specimens.
- Simulated the early heel rise phase of the gait cycle, applying identical loads to each tendon separately.
- Measured rotations at the talonavicular and subtalar joints.
Main Results:
- Peroneus brevis loading resulted in 2.1 degrees greater external navicular rotation compared to peroneus longus.
- Peroneus brevis loading led to 0.9 degrees more calcaneus valgus relative to the talus than peroneus longus.
- The peroneus brevis demonstrated a more effective mechanism for navicular external rotation and calcaneal valgus.
Conclusions:
- The peroneus brevis tendon mechanism is more effective than the peroneus longus in achieving navicular external rotation and calcaneal valgus.
- These findings have significant clinical implications for surgeons aiming to preserve evertor function during tendon-sacrificing procedures.