Trendelenburg sign

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This is the test for postural stability when the patient stands on one leg.
In a normal individual, the pelvis is pulled up by the abductors of the weight bearing leg. The pelvis drops on the unsupported
side if the weight bearing hip is unstable .

The patient has to lurch toward the weight bearing side to shift the center of gravity over the foot and avoid falling. This is called Trendelenburg lurch.

 

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