classificaon%of%joints% locomoon,% … file9/15/11 1 locomoon,% the%knee%and%the%hip%...
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9/15/11
1
Locomo*on, the knee and the hip
Classifica*on of joints
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Hinge joint/ Gångjärnsled e.g. finger and toe joints
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Pivot or trochoid joint/ Vrid-‐ eller rota3onsled e.g. proximal radio-‐ulnar joint
1-‐dimensional
2-‐dimensional
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Ellipsoid joint/ äggled e.g. the wrist
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Saddle joint/ sadelled e.g. the base joint of the thumb
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Extension Flexion
Locking joint/ Spriralled e.g. the knee joint
3-‐dimensional
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Ball and socket joint/ Kulled e.g. hip and shoulder joints
9/15/11
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Mechanics of the knee
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Frontal view without the patella
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Planes of mo*on inserted in the knee
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Menisci
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Sta*c analysis of stair climbing p.189, box 7.1
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Known: • Body weight W • contact point foot-‐step • direcFon of the force in the
patellar tendon, P • contact point in the femur-‐
Fbia joint Derive: • magnitude of the force P in
the patellar tendon • magnitude and direcFon of
the contact force in the femur-‐Fbia joint
Mechanics of the hip
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1. Acetabulum (ledpanna) 2. Gluteus medius 3. Caput femoris (ledhuvud) 4. Collum femoris (lårbenshals) 5. Corpus femoris 6. Labrum
ilium
Iliac crest (hö>benskam)
sacrum
coccyx
Ischium (siAben)
Trocanter major
Neck-‐shaU angle
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