When walking, a person's left pelvis is noted to drop downward in the frontal plane when standing only on the right leg as the left leg swings forward.Weakness in which of the following muscle groups is MOST LIKELY to result in this pelvic movement?

Question

Quizplus · Accepted Answer

The observed pelvic drop, known as a Trendelenburg sign, indicates weakness in the hip abductors of the stance leg. In this case, when the person stands on the right leg and the left pelvis drops, it suggests weakness in the right hip abductors, which are responsible for stabilizing the pelvis during the stance phase of gait.

When Walking, a Person's Left Pelvis Is Noted to Drop