what structure of the knee lubricates
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- The capsule is a thick, fibrous structure that wraps around the knee joint. Inside the capsule is the synovial membrane which is lined by the synovium, a soft tissue that secretes synovial fluid when it gets inflamed and provides lubrication for the knee.our bones make up the knee (see above image): 1  Tibia —commonly called the shin bone, runs from the knee to the ankle. 2  The top of the tibia is made of two plateaus and a knuckle-like protuberance called the tibial tubercle.
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What Type of Membrane Lines the Knee Joint? The fibroblast cells produce hyaluronic acid, which increases viscosity and elasticity of cartilages, and lubricin, which reduces friction between the joint and mediates cell growth. The macrophages are responsible for removing microbes and debris resulting from wear and tear of the joint.
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- Overlying the knee joint is the patella or kneecap, which helps protect the knee joint and increases the efficiency of the quadriceps muscle group on the front of the thigh. Within the knee joint is articular cartilage, which helps absorb shock and decrease friction between moving bones.
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Synovial Joints The joint is surrounded by an articular capsule which is fibrous in nature and is lined by synovial membrane. Because of its rich nerve supply the fibrous capsule is sensitive to stretches imposed by movements. The synovial membrane lines the entire joint except the articular surfaces covered by hyaline cartilage. It is this membrane that secretes the slimy fluid called synovial fluid which lubricates the joint and nourishes the articular cartilage. Varying degrees of movements are always permitted by the synovial joints.
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Stifle Stifle joint problems (OCD, arthritis, cruciate ligament) are also a main source of stifle problems. The stifle is a complex joint that carries a lot of weight. There are two thick pieces of C-shaped fibro cartilage that act as shock absorbers. They are located between the femur and the tibia.ommunication from the patella or kneecap is sent to the femur through the femoral-patella joint. The stifle is made up of these two joints. A thin capsule surrounds the entire stifle joint that has a specialized fluid to help with shock absorption and lubrication.
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Pain management guide Tendons connect the knee bones to the leg muscles that move the knee joint. Ligaments join the knee bones and provide stability to the knee: 1  The anterior cruciate ligament prevents the femur from sliding backward on the tibia (or the tibia sliding forward on the femur).igaments join the knee bones and provide stability to the knee: 1  The anterior cruciate ligament prevents the femur from sliding backward on the tibia (or the tibia sliding forward on the femur).
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Functional Anatomy of the Knee: Movement and Stability Functional Anatomy of the Knee: Movement and Stability. The knee is a joint formed, stabilized and given mobility by the articulation of bones, ligaments and tendons. This joint is the largest joint in the body and is formed by the articulation of the femur bone in the thigh with the tibia in the lower leg.
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Meniscus Tear and Torn Knee Cartilage Meniscus tear is another common injury that affects the knee joint. The meniscus are ‘C’ shaped discs, made of tough cartilage called fibrocartilage. They help to improve the fit between the femur (thigh bone) and the tibia (shin bone) and are important for distributing load and absorbing shock at the knee joint.
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- Normal knee anatomy. The patella is the bone we know as the knee cap. A groove in the end of the femur allows the patella to glide up and down when the knee joint is bent back and forth. In so doing, the patella guides the action of the quadriceps muscle in the lower leg. The patella also protects the knee joint.
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Ligaments and Bursae of the Knee Bones and cartilage make up the knee’s structure but without ligaments and bursae the knee would be unable to bend properly. Ligaments stabilize and strengthen the knee and bursae provide padding so the tendons of the knee joint move freely.
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Synovial fluid Synovial fluid contains lubricin (also known as PRG4) as a second lubricating component, secreted by synovial fibroblasts. Chiefly, it is responsible for so-called boundary-layer lubrication, which reduces friction between opposing surfaces of cartilage.
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- The synovial membrane secretes synovial fluid that lubricates the articular surfaces of the joint. In some joints, the synovial membrane extends outside the joint capsule to form a bursa.The bursa cushions the joint. Bursae are in the knee, elbow, shoulder, and hip.he synovial membrane secretes synovial fluid that lubricates the articular surfaces of the joint. In some joints, the synovial membrane extends outside the joint capsule to form a bursa.
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- The up-and-down and side-to-side accessory motions are referred to as patellar glide. As part of the patellar tendon, there are slips of ligamentous fibers that help hold the patella in place and keep it from moving too far to one side or the other. On the inside of the kneecap is the medial patellofemoral ligament.On the outside is the lateral patellofemoral ligament. Without the medial patellofemoral ligament, the kneecap dislocates laterally (in a direction sideways away from the other knee).he up-and-down and side-to-side accessory motions are referred to as patellar glide. As part of the patellar tendon, there are slips of ligamentous fibers that help hold the patella in place and keep it from moving too far to one side or the other. On the inside of the kneecap is the medial patellofemoral ligament.
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- The medial (inner) meniscus and the lateral (outer) meniscus rest on the tibial surface cartilage and are mobile. The menisci also act as shock absorbers and stabilizers. The knee is stabilized by ligaments that are both in and outside the joint.
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- Collateral Ligaments. These are found on the sides of your knee. The medial collateral ligament is on the inside and the lateral collateral ligament is on the outside. They control the sideways motion of your knee and brace it against unusual movement.t is also vital to movement. Your knee ligaments connect your thighbone to your lower leg bones. Knee ligament sprains or tears are a common sports injury. In the past, injuring more than one knee ligament would put an end to future sports activities.
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Knee Joint The knee, also known as the tibiofemoral joint, is a synovial hinge joint formed between three bones: the femur, tibia, and patella. Two rounded, convex processes (known as condyles) on the distal end of the femur meet two rounded, concave condyles at the proximal end of the tibia....Click to read more below.s the knee is a synovial hinge joint, its function is to permit the flexion and extension of the lower leg relative to the thigh. The range of motion of the knee is limited by the anatomy of the bones and ligaments, but allows around 120 degrees of flexion.
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- Collateral Ligaments. These are found on the sides of your knee. The medial collateral ligament is on the inside and the lateral collateral ligament is on the outside. They control the sideways motion of your knee and brace it against unusual movement. These are found inside your knee joint.
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- It is the largest joint in the human body. The knee is a mobile trocho-ginglymus (a hinge joint), which permits flexion and extension as well as slight internal and external rotation. The knee joint is vulnerable to both acute injury and the development of osteoarthritis.artilage is a thin, elastic tissue that protects the bone and makes certain that the joint surfaces can slide easily over each other. Cartilage ensures supple knee movement. There are two types of joint cartilage in the knees: fibrous cartilage (the meniscus) and hyaline cartilage.
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- There are four ligaments in the knee that help connect the femur to the tibia and keep your legs stable: 1  medial collateral ligament (MCL): The MCL connects your femur to your tibia along the inside of your knee.  lateral collateral ligament (LCL): The LCL connects your femur to your tibia along the outside of your knee.
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Knee Joint Many strong ligaments surround the joint capsule of the knee to reinforce its structure and hold its bones in the proper alignment. On the anterior surface of the knee, the patella is held in place by the patellar ligament, which extends from the inferior border of the patella to the tibial tuberosity of the tibia.
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How do ligaments help the knees move safely? Ligaments are tough, fibrous tissues that connect bones or cartilage at a joint, allowing movement within a safe range. On the inner side of the knee, Ligaments are tough, fibrous tissues that connect bones or cartilage at a joint, allowing movement within a safe range. On the inner side of the knee, a large ligament called the medial collateral ligament, or MCL, connects the femur to the tibia on the inside (big-toe side) of the knee joint, limiting sideways motion. The lateral collateral ligament does the same on the outside (little-toe side), connecting the femur to the small bone of the calf, or fibula.
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Cartilage of the Knee A meniscus is a piece of cartilage that acts as a shock absorber between bones. It stabilizes the joints by evenly distributing the load across the joint area. In the knee, the crescent-shaped menisci are in between the ends of the upper (femur) and lower (tibia) leg bones.artilage is a type of firm, thick, slippery tissue that coats the ends of bones where they meet with other bones to form a joint.
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Knee and Meniscus Anatomy The medial patellofemoral ligament (MPFL) is a continuation of the deep retinaculum and vastus medialis oblique (VMO) muscle fibers (inner portion of the quadriceps muscle) on the inside of the knee.ext to the tibia is the fibula, which runs parallel to the tibia on the outside of the leg. The patella, commonly called the knee cap, is embedded in the quadriceps and patellar tendon which articulates with the front of the femur, which forms the patellofemoral joint.
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Anatomy Collateral Ligaments. These are found on the sides of your knee. The medial collateral ligament is on the inside of your knee, and the lateral collateral ligament is on the outside. They control the sideways motion of your knee and brace it against unusual movement.
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- The knee, also known as the tibiofemoral joint, is a synovial hinge joint formed between three bones: the femur, tibia, and patella. Two rounded, convex processes (known as condyles) on the distal end of the femur meet two rounded, concave condyles at the proximal end of the tibia....Click to read more below.any strong ligaments surround the joint capsule of the knee to reinforce its structure and hold its bones in the proper alignment. On the anterior surface of the knee, the patella is held in place by the patellar ligament, which extends from the inferior border of the patella to the tibial tuberosity of the tibia.
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- A knee is flexible because of its complex structure of bones, cartilage, ligaments, muscles, and tendons working together. The knee joint contains three bones: femur (thighbone) tibia (shinbone) and patella (kneecap).n a healthy knee joint, the surfaces of these bones are quite smooth. They are covered with a tough protective soft tissue called cartilage. Ligaments, another type of soft tissue, lie along the sides and back of the knee, holding the bones of the knee joint in place.