Just listening to coworkers grip about any little thing.
Tink29, the closest answer I could figure for the back of the knee is the Posterior Cruciate Ligament, a close cousin to the ACL that gets torn so frequently. It's the tendon that runs down the back of the joint, connecting the back of your shins to the back of your knee. Hope that answer satisfies. If you go to Yahoo reference, thay have an online copy of Gray's Anatomy for pictures of it.