Which nerve is most closely associated with the Trendelenburg sign?

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Multiple Choice

Which nerve is most closely associated with the Trendelenburg sign?

Explanation:
Trendelenburg sign reflects weakness of the hip abductors, especially gluteus medius and gluteus minimus, which stabilize the pelvis during single-leg stance. These muscles are supplied primarily by the superior gluteal nerve. When the stance-side abductors are weak, the pelvis drops on the opposite side as you stand on one leg, producing a positive Trendelenburg sign. The other nerves—inferior gluteal (gluteus maximus), sciatic (posterior thigh/leg), and femoral (quadriceps)—do not primarily control this lateral pelvic stabilization, so they’re less implicated in this sign.

Trendelenburg sign reflects weakness of the hip abductors, especially gluteus medius and gluteus minimus, which stabilize the pelvis during single-leg stance. These muscles are supplied primarily by the superior gluteal nerve. When the stance-side abductors are weak, the pelvis drops on the opposite side as you stand on one leg, producing a positive Trendelenburg sign. The other nerves—inferior gluteal (gluteus maximus), sciatic (posterior thigh/leg), and femoral (quadriceps)—do not primarily control this lateral pelvic stabilization, so they’re less implicated in this sign.

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