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KNEE JOINT-LOCKING MECHANISM

Anatomy-Lower Limb

KNEE JOINT-LOCKING MECHANISM

Hyperextension of the knee is terminated by the locking mechanism of the knee - medial rotation of the femur on the tibial plateau. Lateral rotation by the popliteus unlocks the knee. Medial rotation tightens 4 ligaments:
1. ACL - the first to become taught.
2. MCL - prevents further rotation.
3. LCL - prevents further rotation.
4. Oblique popliteal ligament - prevents further rotation.


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REFERENCES

1. Mcminn. (2003). Last's Anatomy. Elsevier Australia. ISBN:0729537528. Read it at Google Books - Find it at Amazon
2. Netter, F. H. (2019). Atlas of human anatomy. Philadelphia, PA: Elsevier.
3. Image: no reference available.

Ⓒ A. Manickam 2018

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