A practical treatise on fractures and dislocations . e as in the case related by Syme ; butthe glutseus minimus was not torn, and there was added a laceration of the ob-turator externus. Dr. Lente has reported one other dissection made Dr. Bigelow speaks of a dorsal (upon the ilium) dislocation as sometimesoccupying a position as low as the upper portion of the ischiatic notch ; butthe dislocation now under consideration he describes as that in which the headof the femur, having been driven from its socket downward and backward, issubsequently, in the attempt to straighten the
A practical treatise on fractures and dislocations . e as in the case related by Syme ; butthe glutseus minimus was not torn, and there was added a laceration of the ob-turator externus. Dr. Lente has reported one other dissection made Dr. Bigelow speaks of a dorsal (upon the ilium) dislocation as sometimesoccupying a position as low as the upper portion of the ischiatic notch ; butthe dislocation now under consideration he describes as that in which the headof the femur, having been driven from its socket downward and backward, issubsequently, in the attempt to straighten the limb, carried upward behind thesocket until it is arrested by the strong tendon of the obturator iuternus, and Dislocation upward and backward into the greaischiatic notch. 1 Amer. Journ. Med. Sci., vol. xxxii. p. 460. 2 Lente, New York Journ. Med., Jan. 1851. 708 DISLOCATIONS OF THE THIGH, the subjacent capsule. This is usually denominated ischiatic; but as it isboth behind and below the tendon, Bigelow calls it dorsal below the tendon. Fig. Fig. 456. Internal obturator in its natural position. (Bigelow.) Quain1 made a careful dissection of a recent ischiatic dislocation, in which noattempt at reduction had been made. The head of the femur rested upon the ischiatic spine, and was separated from thepelvic bones only by the obturator internusand the gemelli. The pyramidalis, situatedabove the head of the femur, was moderatelystretched. The gemelli and obturator internuswere greatly stretched; which last-mentionedmuscles, with the capsular ligament, aloneseparated the head from the cotyloid cavity,and from the surface of the innominatumsituated behind this cavity. The externalobturator and the quadratus were torn trans-versely. The capsule was detached from thecotyloid margin at its inferior and internalinsertions, while its posterior and externalportions were intact. The round ligamentwas torn from its insertion into the head ofthe femur. In a case reported by Scott,2 the
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