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Musculoskeletal worksheet

Musculoskeletal worksheet - Musculoskeletal Worksheet 1...

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Musculoskeletal Worksheet 1. Bones heal through the process of fibrocartilaginous callus formation: Hematoma at site of injury → Cellular Proliferation (Osteoblasts multiply and differentiate into fibrocartilage) → Callus Formation → Ossification (Sides of fracture unite) → Mature bone replaces callus (Cast may be removed) → Remodeling (Resorption of excess callus) 2. Definitions: Tendon Connects muscle to bone Dense fibrous connective tissue; Collagen bundles Provides great tensile strength Withstands pull in fiber alignment direction Ligament Connects bone to bone Crucial to skeletal joint function Prevents dislocation of bone from its normal position Fascia Layers of connective tissue with intermeshed fibers Can withstand limited stretching Bursae Small sacs of connective tissue that contain synovial fluid for lubrication Located between the skin and surface of bone or joint Areas where tendons, muscles, and cones have tendency to rub against each other Aids in movement in the synovial joints Menisci Crescent shaped cartilage in the joint of the knee (Ligament) Lateral and Medial Provide support with tension and torsion; protect ends of bones from rubbing against each other; SHOCK ABSORBERS; deepen tibial socket where femur attaches 3. Types of joints & Structure of Diarthordial joints: Joint - (articulation)where 2 or more bones meet or come together; responsible for range of motion; Move in relation to each other Classification by mechanical configuration Spheroidal : located in the shoulder and hip; Ball & Socket contour allowing for broad range of motion not only back and forth, but also swiveling Hinge : flat and slightly curved; allow movement in only 1 axis- flexion & extension (ex: elbow) Condylar : articulating ends of bones are not connected directly; linked by a strong, fibrous capsule surrounding the joint (ex: knee) Classification by material composition Fibrous : located where bones are joined with connective tissue; NO movement (ex: sutures of the skull) Synovial : most common & relevant to injury & loss of range of motion; joints between bones that don’t come into contact with each other; Slide over each other bc bones lined with cartilage; Separated by synovial capsule surrounding the joint and secretes synovial fluid
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Musculoskeletal Worksheet Cartilaginous : slightly moveable; between vertebrae and symphysis pubis; separated by fibrous disk; joined by interosseous ligaments ** Better explanation I found after I wrote this: Bones of Synovial joints make physical contact at their cartilaginous ends. Bones are connected at joints (articulations) and all bone movement occurs at joints. They are functionally classified as immovable, partly movable, and freely movable. The most secure are immovable and the most vulnerable are freely movable. The architecture of freely movable joints determines their direction and range of motion.
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