notes
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| body mechanics | safe and efficient use of the body using scientific reasoning based on kinesiology and physiology
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| goal of body mechanics | conserve energy, decrease stress & strain, prevent injury
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| forces | gravity & friction
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| center of gravity (COG) | point where mass is equally distributed
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| base of support (BOS) | part of object in contact with support surface
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| line of gravity | perpendicular line thru COG & BOS
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| ways to improve stability | 1)decrease COG 2)centralize COG over BOS 3)increase size of BOS 4)increase weight
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| other rules | every action has equal and opposite reaction/ increase mobility-decrease stability & vice versa
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| COG in the body | about S2 in adults
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| BOS in body | changes according to position
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| anatomy of disc | nucleus populous-soft / annulus fibrosus-tough
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| purpose of disc | gives mobility & acts as shock absorber & flexibility
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| imbibing | fills with fluid at night
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| area of the disc @ risk for injury with flexion | posterior
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| area of the disc @ risk for injury with extension | anterior
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| area of the disc @ risk for injury with flex/rotation | posterior/lateral
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| lever system | weight of object + upper body X 10
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| dynamic support | trunk muscles are like a corset
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| when lifting... | use legs
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| sprain | soft tissue injury to joint
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| osteoarthritis | wearing out/may cause bone spurs
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| mm strain | tearing of muscle
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| types of disc injury | tearing, bulging, rupture, herniation (HNP)
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| forces causing back injury can be... | prolonged forces, repetitive, or could be one time big thing
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| laminectomy | removal of part of bone or disc
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| discectomy | removal of whole disc
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| fusion | vertebrae fused together
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| increased lordosis... | caused by anterior pelvic tilt, lumbar ext, hip flexors
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| decreased lordosis... | caused by posterior pelvic tilt, abs, hip extensors (glut. max)
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| pelvic tilt is determined by... | the movement of the anterior superior iliac spine (ASIS)
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| lateral plumbline | thru ear, thru acromium, just posterior to hip joint axis (greater trochanter), just anterior to knee axis, just anterior to ankle axis (laterl malleolus)
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