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Quadriceps strength deficit associated with rectus fernoris rupture: a case report
P J McNair1, R N Marshall, J A Matheson
1Department of Human Movement Studies, The University of Western Australia, Perth, Australia.
Clinical Biomechanics (Bristol, Avon)
|August 7, 2013
Summary
Rectus femoris rupture in the quadriceps muscles can cause significant knee extensor strength deficits. This study found a mean strength deficit of 16.6% in a patient with this injury.
Area of Science:
- Sports Medicine
- Orthopedic Surgery
- Human Physiology
Background:
- Rectus femoris rupture is a specific injury within the quadriceps muscle group.
- Understanding the functional deficits following such injuries is crucial for rehabilitation and return to activity.
Purpose of the Study:
- To quantify the knee extensor muscle strength deficits in a case of rectus femoris rupture.
- To assess these deficits across a range of isokinetic testing velocities.
Main Methods:
- Isokinetic dynamometry was used to assess knee extensor strength.
- Testing was performed at multiple joint angular velocities: 60, 120, 180, 240, and 300 degrees per second.
Main Results:
- A mean strength deficit of 16.6% was observed in the affected limb.
- This deficit was measured across all tested isokinetic velocities, indicating a consistent reduction in muscle function.
Conclusions:
- Rectus femoris rupture leads to substantial and measurable deficits in knee extensor strength.
- Isokinetic testing provides a quantitative measure of strength loss, valuable for guiding recovery protocols.
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