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A cane held in the contralateral hand reduces joint reactive forces through the affected hip approximately 50% by which of the following mechanisms?
Reducing hip abductor muscle pull
Increasing hip flexor muscle pull
Moving the center of rotation for the femoroacetabular joint
Increasing joint congruence at the femoroacetabular joint
Moving the center of gravity posterior to the second sacral vertebra
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Figure A represents a free body diagram of the hip of a patient standing on the right leg. The forces and distances are labeled on the diagram and the resulting hip joint force (J) = 1800N. What is the resultant value for J when the acetabular component is medialized given the new distances shown in Figure B?
Patients display a Trendelenburg gait to compensate for weakness in which of the following muscle groups?