Class 2 Musculoskeletal

Class 2 Musculoskeletal - IE 492/592 Industrial Ergonomics...

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IE 492/592: Industrial Ergonomics 1 The Musculoskeletal System IE 492/592 and H 494/594 Applied Ergonomics Tony Brace MS, CPE
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IE 492/592: Industrial Ergonomics 2 Musculoskeletal System Application of physics to human body requires some basic knowledge and function of Musculoskeletal system Function Protect organs, protect body Sustain body motion 6 Major Substructures Tendons Ligaments Muscles Fascia Bone Cartliage
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IE 492/592: Industrial Ergonomics 3 Connective Tissue -- connections and infra-structure Tendons -- transmits force from muscle to bone. Ligaments -- connects bone to bone and stabilize joint structures Fascia -- general connective tissue Skin Bone -- framework and supra-structure Long Bones -- extremities, e.g. femur, tibia, fibula. Short Bones -- wrist and ankle, e.g. carpals,tarsals. Flat Bones -- cranium and ribs. Irregular Bones-- spinal column, pectoral girdle. The Musculoskeletal System
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IE 492/592: Industrial Ergonomics 4 Joints Fibrous Joints -- sutures in skull and pelvis Cartilaginous Joints -- intervertebral discs, sternum Synovial Joints -- finger, elbow, and knee. Muscles - actuators The Musculoskeletal System
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IE 492/592: Industrial Ergonomics 5 Connective Tissue
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IE 492/592: Industrial Ergonomics 6 Connective tissues are composed of cells and an extra-cellular matrix Cells produce matrix Matrix = fibers and ground substance. Determines physical properties of different connective tissues Extracellular Matrix Collagen Fibers- high tensile, resistant to deformation Elastic Fibers- elastic, low tensile strength Both present in varying proportions Ground Substance Glycoproteins, Lipids Calcium Water Cellular Structure
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IE 492/592: Industrial Ergonomics 7 Tendon fibers Tendons are tough bands of connective tissue Mostly made of collagen Arrayed in parallel formation Do not stretch.
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