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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.
Patellar tendinitis, also known as jumper's knee, is an overuse injury of the tendon that straightens the knee. [1] Symptoms include pain in the front of the knee. [1] Typically the pain and tenderness is at the lower part of the kneecap, though the upper part may also be affected. [2] Generally there is no pain when the person is at rest. [2]
Risk factors include patellar tendinitis, kidney failure, diabetes, and steroid or fluoroquinolone use. [1] [2] There are two main types of ruptures: partial and complete. [1] In most cases, the patellar tendon tears at the point where it attaches to the knee cap. [1] Diagnosis is based on symptoms, examination, and medical imaging. [1]
The tibial tuberosity thus forms the terminal part of the large structure that acts as a lever to extend the knee-joint and prevents the knee from collapsing when the foot strikes the ground. [1] The two ligaments, the patella, and the tibial tuberosity are all superficial, easily palpable structures. [2]
The most likely time for the patella to shift laterally is during the first 20–30 degrees of flexion as the quadriceps tighten simultaneously and pull the patella laterally. Beyond 30 degrees, the quadriceps tendon and patellar ligament pull the patella posterior into the groove of the knee joint making lateral dislocation of the patella ...
Patellar overload syndrome, runner's knee, [1] retropatellar pain syndrome [1] 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 ...
Complications may include an inability to fully straighten the knee. [2] The underlying mechanism may involve bleeding, inflammation, or insufficient space for the fat pad. [2] This may occur as a result of trauma or surgery to the knee. [1] Diagnosis may be supported by magnetic resonance imaging (MRI). [2]
These include the subacromial, prepatellar, retrocalcaneal, and pes anserinus bursae of the shoulder, knee, heel and shin, etc. (see below [broken anchor]). [1] Symptoms vary from localized warmth and erythema (redness) [ 1 ] to joint pain and stiffness, to stinging pain that surrounds the joint around the inflamed bursa.