Hip arthritis vs bursitis

There is a large tendon (patellar tendon) which envelopes the knee cap and attaches to the front of the tibia bone.The knee joint is surrounded by a joint capsule with ligaments strapping the inside and outside of the joint (collateral ligaments) as well as crossing within the joint (cruciate ligaments).The complexity of the design of the knee joint and the fact that it is an active weight-bearing joint are factors in making the knee one of the most commonly injured joints. The thigh bone (femur) meets the large shin bone (tibia) forming the main knee joint.Injury can affect any of the ligaments, bursae, or tendons surrounding the knee joint.The meniscus acts as a smooth surface for the joint to move on.This joint has an inner (medial) and an outer (lateral) compartment.These ligaments provide stability and strength to the knee joint.In the back of the thigh, the hamstring muscles flex, or bend, the knee.There are large blood vessels passing through the area behind the knee (referred to as the popliteal space). In the front of the thigh, the quadriceps muscles extend, or straighten, the knee joint by pulling on the patellar tendon.The knee flexes normally to a maximum of 135 degrees and extends to 0 degrees.

Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. The knee joint is surrounded by fluid-filled sacs called bursae, which serve as gliding surfaces that reduce friction of the tendons.The bursae, or fluid-filled sacs, serve as gliding surfaces for the tendons to reduce the force of friction as these tendons move. Each meniscus serves to evenly load the surface during weight-bearing and also aids in disbursing joint fluid for joint lubrication.The kneecap (patella) joins the femur to form a third joint, called the patellofemoral joint.The meniscus is a thickened cartilage pad between the two joints formed by the femur and tibia.


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