THE HIP-JOINT 



429 



After the muscles have been thoroughly stretched, torn, or 

 divided by tenotomy, the head is placed in the acetabulum, 

 and the limb is fixed in plaster of Paris with the thigh abducted 



FIG. 126. Congenital Dislocation of the Hip-Joint in a Child aged five. 

 The head of the femur is not in the acetabulum, and the angle of the 

 neck is greater than normal. The femur is medially rotated. Observe 

 the epiphyses for the head of the femur and the greater trochanter. The 

 dark area passing through the acetabulum corresponds to two of the 

 limbs of the triradiate bar of cartilage. 



to a right angle and laterally rotated the " frog " position. 

 When this is done, the head of the femur can be felt anterior 

 to the acetabulum, where a distinct depression existed prior 



