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Osseous Anatomy

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Now let's look at the osseous anatomy,

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and if we do so, we can see the anatomy,

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the intercondylar notch of the femur.

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This is a rather narrow chamber

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or channel right

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through which the anterior posterior

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cruciate ligaments passed.

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So you can imagine that if we had a anatomically narrow

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notch where we had osteophytes

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that were narrowing the notch,

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they may make the anterior cruciate ligament

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or posterior cruciate ligament more vulnerable to injury.

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Some people have tried to figure out why anterior cruciate

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ligament tears are more common in female

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athletes than male athletes.

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Some suggest it's related to a more narrow

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intercondylar notch,

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but the ligament size is also differs in men and women.

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So it's probably more complicated than that.

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Another point I wanna make is the effective

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rotation on these ligaments.

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Here's a picture of

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what those ligaments look like in the coronal plane in

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a neutral position.

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Here's external rotation.

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Here is internal rotation of between external

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and internal rotation.

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The internal rotation is less forgiving, all right,

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because it, it will in fact

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entwine the cruciate ligaments, whereas

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external rotation unwinds them.

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So although external rotation

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and internal rotation both can contribute to tears

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of the cruciate ligament, internal rotation

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of the tibia in particular

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can make those ligaments vulnerable.

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Another point about the intercondylar notch of the femur,

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it, it has a kind of a sharp roof, and

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therefore, you can imagine with hyperextension of the knee

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that you may in fact have impingement of the roof

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on the cruciate ligaments

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and is associated with tearing

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of the cruciate ligaments here,

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the anterior cruciate ligaments.

Report

Faculty

Donald Resnick, MD

Professor Emeritus, Department of Radiology

University of California, San Diego

Mini N. Pathria, MD, FRCP(C)

Division Chief, Musculoskeletal Imaging

University of California San Diego

Eric Y. Chang, MD

Adjunct Professor, Radiology

University of California, San Diego

Brady K. Huang, MD

Clinical Professor of Radiology

UC San Diego Medical Center

Tags

Musculoskeletal (MSK)

MRI

Knee