The patella is found in many tetrapods, such as mice, cats and birds, but not in whales, or most reptiles. The base is also what attaches to the quadriceps tendon. These include: There are three types of anatomical variations in a healthy patella based on the size and symmetry of the patella itself. The blood supply to the patella arises from the genicular arteries, branches of the popliteal artery. the kneecap bone which is present in most mammals, and in some birds and reptiles, protecting the front of the joint from injury. Under the patella and the at the end of the femur is articular cartilage, which makes it possible for the patella and femur bones to move alongside each other. The bone originates from multiple ossification centres that develop from the ages of three to six, which rapidly coalesce. Updated December 2017. The patellofemoral pf joint due to its particular bone anatomy and the numerous capsuloligamentous structures and muscles that act dynamically on the patella is considered one of the most complex joints in the human body from the biomechanical point of view. Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. See GLC7. In humans and other primates, the knee joins the thigh with the leg and consists of two joints: one between the femur and tibia (tibiofemoral joint), and one between the femur and patella (patellofemoral joint). Kim Bengochea, Regis University, Denver, Author: In normal patients the knee should extend slightly. If there are no fragments resulting from dislocation the usual treatment consists of immobilizing the knee until the swelling decreases (roughly three to six weeks) along with taking non-steroidal anti-inflammatory medications (NSAIDs) to help with any pain or discomfort. Learn more. not experienced the pain of the dislocation, they are less likely to be concerned. The middle of the patella consists of openings for arteries to supply blood to the kneecap. The doctor tells you that he thinks it is the fabella bone and that he may have Fabella Syndrome. 2. The tension in the medial patellar retinaculum also helps in its stability. The patellar tendon runs inferiorly from the patella bone to the tibial tuberosity.The patella is a large sesamoid (a bone within a tendon) bone with a triangular transverse cross-section, that lies within the quadriceps tendon.Another example of a sesamoid bone is the pisiform carpal bone that lies within the tendon of flexor carpi ulnaris. The patella (plural: patellae) is the largest sesamoid bone in the human body. the femoral the lower two divisions of the femoral nerve. It is the largest sesamoid bone in the human body. Treasure Island, FL: StatPearls Publishing; 2019. The lateral articulating surface of the patella is usually larger than the medial articulating surface. It is commonest in children aged twelve to fourteen years of age, and among those children that play a lot of sports. The bone has a medial and lateral border, as well as its base which lies proximally. Joint, patellofemoral: One of the knee joints. Oh! Patellar dislocation is also common in patients who have had prolonged bed rest. Patellofemoral Knee Replacement Is Just for the Kneecap, Everything You Need to Know About the Ribs, How Physical Therapy Can Treat a Patella or Kneecap Dislocation, Patella injuries can be relatively common. Patellar Dislocation. Learning anatomy is a massive undertaking, and we're here to help you pass with flying colours. While tendon tears usually repair on its own, bone fragments will likely need to be removed surgically. The kneecap is an example of a bone we are all familiar with, and which has a significant functional role. The patella sits on the anterior surface of the femoral condyles, and is hence relatively vulnerable. The patient is asked to relax their knee, and the patella ligament (below the tibial tuberosity, and above the tibial shaft) is struck. This makes the femur become a joint facet, as it also connects with a medial and lateral condyle of the femur. The attachment of the quadriceps muscle if found on the superior surface extends distally onto the anterior surface. Symptoms include swelling of the knee and pain in the region. lae 1. a. ... anatomy a small flat triangular bone in front of and protecting the knee joint. The apex, or point, of the patella points downward towards the shin while the base of the bone sits upward towards the thigh. The patella sits between the femur and tibia, not only protecting the knee joint but connecting muscles in the front of the femur to the tibia. Choose from 500 different sets of patella anatomy flashcards on Quizlet. Also called kneecap . 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