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The patella is found in many tetrapods, such as mice, cats, birds and dogs, but not in whales, or most reptiles. In humans, the patella is the largest sesamoid bone (i.e., embedded within a tendon or a muscle) in the body. Babies are born with a patella of soft cartilage which begins to ossify into bone at about four years of age.
The patellar tendon is a strong, flat ligament, which originates on the apex of the patella distally and adjoining margins of the patella and the rough depression on its posterior surface; below, it inserts on the tuberosity of the tibia; its superficial fibers are continuous over the front of the patella with those of the tendon of the quadriceps femoris.
The patella rests in the trochlear, which is found in the distal part of the femur. The patella can dislocate from the groove because of trauma or an unnatural twisting of the knee. [5] When dislocated, the soft tissue layer that the patella rests in is damaged; the patella is forced out of its groove and back into place.
patella and tibial tuberosity via patellar tendon: femoral artery: femoral nerve: knee extension; hip flexion: hamstring: 2 1 vastus lateralis: Lower limb, Thigh, Anterior compartment greater trochanter, intertrochanteric line, and linea aspera of femur: patella and tibial tuberosity via patellar tendon: femoral artery: femoral nerve: extends ...
Diagram of the bones of the lower extremity. Rough distribution of areas affected by PFPS highlighted in red: patella and distal femur. Specialty: Orthopedics, sports medicine: Symptoms: Pain in the front of the knee [1] Usual onset: Gradual [2] Causes: Unclear [1] Risk factors: Trauma, increased training, weak quadriceps muscle [1] Diagnostic ...
The knee is a modified hinge joint, a type of synovial joint, which is composed of three functional compartments: the patellofemoral articulation, consisting of the patella, or "kneecap", and the patellar groove on the front of the femur through which it slides; and the medial and lateral tibiofemoral articulations linking the femur, or thigh bone, with the tibia, the main bone of the lower ...
Anteriorly, the infrapatellar fat pad is inserted below the patella and between the two membranes. It extends from the lower margin of the patella above, to the infrapatellar synovial fold below. With its free upper margin, this fold extends dorsally through the joint space to surround the two cruciate ligaments from the front, thus dividing ...
Removed some text. Patella is anterior to the knee and not in the center of it: 18:57, 17 April 2011: 800 × 729 (29 KB) John Holmes II: Edited in Adobe Illustrator to make some of the arrows more clear. 07:55, 19 July 2010: 800 × 729 (58 KB) Mysid: DejaVu Sans Condensed: 14:17, 14 November 2008: 800 × 729 (63 KB) ChrisiPK