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 Hinge joint/ Gångjärnsled e.g. finger and toe joints Pivot or trochoid joint/ Vrid eller rota3onsled e.g. proximal radioulnar joint 1dimensional 2dimensional Ellipsoid joint/ äggled e.g. the wrist Saddle joint/ sadelled e.g. the base joint of the thumb Extension Flexion Locking joint/ Spriralled e.g. the knee joint 3dimensional Ball and socket joint/ Kulled e.g. hip and shoulder joints

Transcript of Classificaon%of%joints% Locomoon,% … file9/15/11 1 Locomoon,% the%knee%and%the%hip%...

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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    

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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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Arthrosis    

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StaFc  analysis  of  the  forces  in  the  hip  during  single-­‐leg  stance  

p.211,  box  8.1    

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