Which of the following statements is true concerning the neck-to-shaft angle (angle of inclination) of the femur?
a. The normal angle in adults is approximately 100 ° to 115 °.
b. A decrease in the normal angle is called coxa valga.
c. Coxa valga will decrease the lever arm of the hip abductor muscles.
d. It is the angle formed between the axis of the femoral neck and the transverse axis of the femoral condyles.
ANS: C
There are two angulations made by the head and neck of the femur relative to the shaft. One is the angle of inclination, which occurs in the frontal plane between an axis through the femoral head and neck and the longitudinal axis of the femoral shaft. The normal angle in adults is 125 °. An increase in the angle is called coax valga and leads to a decrease in the lever arm of the hip abductor muscles.
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