<prompt> Trendelenburg test is done for:Gluteus medius, minimusGluteus maximus, minimusGluteus maximus, mediusGluteus maximus, medius, minimus  <response>: Ans. a Gluteus medius, minimusRef : BDC 6th ed. vol. II 69-70; Keith L. Moore 5th ed. 619-621 Trendelenburgs sign is found in people with weak or paralyzed abductor muscles of the hip, namely gluteus medius and gluteus minimus. Superior gluteal nerve, if injured, paralyses the 3 muscles: gluteus medius, gluteus minimus and tensor fascia latae and hence lead to positive Trendelenberg test. These 3 muscles, especially the gluteus medius raises the unsupported hip during walking, which otherwise will be pulled down by the gravity. In Trendelenberg test this action of gluteus medius superior pelvic tilt of contralateral hip is absent and we actually observe that there is a downward drop of the unsupported hip- due to unopposed action of gravity. This leads to Lurching gait in the patient.Also Know Trendelenburg test becomes positive inp congenital dislocation of hip long standing fracture of neck of femur. Inferior gluteal nerve supplies gluteus maximus. 