Anterolateral rotatory instability is an excessive internal rotation of the tibia on the femur when the knee is bent, leading to excessive opening of the joint at the outer (lateral ) side.
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Relevant content -
Journal interpretation -
- 2000 - Lateral Stabilizing Structures of the Knee: Functional Anatomy and Injuries Assessed with MR Imaging - Authors: Recondo JA et al, and interpreted for you by Dr Sheila Strover (Clinical Editor)
The test for anterolateral rotatory instability is also called the 'Slocum Test'. Here is a video showing the Slocum test and embedded courtesy of 'HDAllDay21' -