<prompt> Trendelenburg sign isnt positive in damage of the following nerveInferior gluteal nervePudendal nerveSuperior gluteal nervePosterior tibial nerve  <response>: Causes of positive trendelenberg test: There are three fundamental causes: 1 Paralysis of the abductor muscles eg. Polio Paralysis of superior gluteral nerve 2 Marked approximation of the inseion of the abductor muscle to their origin by upward displacement of the greater trochanter; so that muscles are slack. eg. Severe coxa vara Dislocation of hip 3 Absence of stable fulcrum lever arm about which the abductor muscles can act Neck femur fracture Dislocation of hip :Ref: Maheshwari 4the p.348 