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Related Concept Videos

Knee Joint01:23

Knee Joint

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The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris...
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Ankle Joint01:10

Ankle Joint

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The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...
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Bones of the Lower Limb: Femur and Patella01:16

Bones of the Lower Limb: Femur and Patella

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The femur is the body's longest and strongest bone spanning the thigh region. Its head articulates with the acetabulum of the hip bone to form the hip joint. A minor indentation on the medial side of the femoral head, called the fovea capitis, serves as the site of attachment for the ligament of the head of the femur. This weak ligament spans the femur and acetabulum and supports the hip joint. The narrowed region below the head is the neck of the femur. The inclination angle between the...
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Development of the Limb Synovial Joints01:07

Development of the Limb Synovial Joints

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Joints form during embryonic development in conjunction with the formation and growth of the associated bones. The embryonic tissue that gives rise to all bones, cartilage, and connective tissues of the body is called mesenchyme.
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
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Joints01:26

Joints

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Joints, also called articulations or articular surfaces, are points at which ligaments or other tissues connect adjacent bones. Joints permit movement and stability, and can be classified based on their structure or function.
Structural joint classifications are based on the material that makes up the joint as well as whether or not the joint contains a space between the bones. Joints are structurally classified as fibrous, cartilaginous, or synovial.
Fibrous Joints Are Immovable
The bones of a...
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Structural Joints: Synovial Joints01:16

Structural Joints: Synovial Joints

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Synovial joints are the most common type of joint in the body. A key structural characteristic for a synovial joint is the presence of a joint cavity. This fluid-filled space is where the articulating surfaces of the bones contact each other. Also, unlike fibrous or cartilaginous joints, the articulating bone surfaces at a synovial joint are not directly connected to each other with fibrous connective tissue or cartilage. This gives the bones of a synovial joint the ability to move smoothly...
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Related Experiment Video

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Tissue Collection and RNA Extraction from the Human Osteoarthritic Knee Joint
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Dashboard (in the) knee.

M S Patel, A A Qureshi, T P Green

    Annals of the Royal College of Surgeons of England
    |February 28, 2015
    PubMed
    Summary
    This summary is machine-generated.

    A plastic dashboard foreign body caused knee pain after a road accident. Arthroscopic removal of the object resolved the mechanical knee symptoms.

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    Area of Science:

    • Orthopaedic surgery
    • Trauma care

    Background:

    • Road traffic accidents can cause knee injuries.
    • Dashboard injuries are a specific type of trauma.
    • Mechanical knee symptoms can be debilitating.

    Observation:

    • A 19-year-old presented with intermittent mechanical knee symptoms months after a road traffic accident.
    • Initial examination and magnetic resonance imaging (MRI) were unremarkable.
    • An intra-articular plastic foreign body, suspected to be from the dashboard, was found during arthroscopy.

    Findings:

    • Arthroscopic assessment identified an intra-articular plastic foreign body.
    • Surgical removal of the foreign body was performed.
    • Complete resolution of mechanical knee symptoms was achieved post-retrieval.

    Implications:

    • Intra-articular foreign bodies should be considered in cases of persistent mechanical knee symptoms after trauma, even with normal initial imaging.
    • Arthroscopy is a valuable tool for diagnosing and treating intra-articular injuries.
    • Prompt diagnosis and surgical intervention can lead to excellent patient outcomes in traumatic knee injuries.