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Archive for April 5th, 2011

Knee Bones

Knee Bones

To understand how osteoarthritis affects your knee you need to understand how your knee works.  This series of blog posts will introduce you to the anatomy of your knee.  Let’s begin with the basic building blocks – the bones.  There are four bones we need to discuss:

Femur: Also known as the thigh bone is the longest bone in the human body.  The top of the femur forms the hip joint while the bottom of the femur forms the knee.

Patella: Also known as the knee cap.  It kind of looks like a triangle with its tip facing down towards your feet.  It is the largest sesamoid bone in your body.  A sesamoid bone is a bone embedded inside a tendon.  The patella’s primary role is to help you straighten your leg.

Tibia: Also known as the shin bone is the second largest bone in the human body.  It is the longest and strongest of the two bones that comprise the bottom of your knee and the top of your ankle.  It is the strongest weight-beaing bone in most people.

Fibula: Also known as the calf bone is the smaller on the two bones that comprise the bottom of your knee and the top of your ankle.  It’s located alongside the tibia towards the outside of your body.