These authors point out that the anatomy of the rear of the knee is generally not well understood by the medical professionals dealing with problems that may involve this area. Although the outer or lateral side at the back of the knee is sometimes referred to as 'the dark side of the moon', this article points out that the anatomy of the inner or medial side at the back of the knee is even more so - and even less is published about the important anatomy here.
Anatomy of the Posteromedial Corner
The PMC contains the structures lying between the posterior margin of the longitudinal fibres of the superficial medial collateral ligament (MCL) and the medial border of the posterior cruciate ligament (PCL). Within these borders are the five major components of the PMC:
- the semimembranosus tendon and its expansions
- the oblique popliteal ligament (OPL)
- the posterior oblique ligament (POL)
- the posteromedial joint capsule
- the posterior horn of the medial meniscus.
The paper is a very nice one, and rich with images. If you have a particular interest in the topic, there is a link at the top of this page to the free full online text with images..
Test for anteromedial rotatory instability (AMRI)
Our illustration of the knee bones from the medial side, showing the semimembranosus tendon (SM) and its expansions (SME) [G:gastrocnemius, POL:posterior oblique ligament, MCL:medial collateral ligament.]