The hip and its diseases / by V.P. Gibney.

  • Gibney, V. P. (Virgil Pendleton), 1847-1927.
Date:
1884,©1883
Catalogue details

Licence: Public Domain Mark

Credit: The hip and its diseases / by V.P. Gibney. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    quadratus femoris. If the limb be extended the gluteus assists in adduction, if flexed the external obturator assists, and if extreme outward rotation is completed or'prevented, then the quadratus acts as an adductor. The Abductors.—The muscles which support the pelvis on one thigh—the gluteus medius and gluteus minimus are strong abductors, and their most powerful action is displayed when one limb becomes the basis of support. The gluteus maximus, with its upper fibres and the tensor vagina femoris are auxiliary to the above act. The sar- torius abducts while flexing both hip and knee. The Inward Rotators.—The tensor vagina femoris and the anterior portions of the gluteus medius and gluteus minimus are the muscles here employed. The Outward Rotators.—These muscles occupy places on both sides of the joint, and in front we have the psoas and iliacus—the chief flexors. On the inner aspect the pec- tineus and the three adductors; on the inferior and posterior aspect the obturator externus. Posteriorly are the quad- ratus femoris, the gemelli, the obturator internus, the pyriformis, and the posterior portion of the gluteus minimus and gluteus medius. These are all assisted by the gluteus maximus. When the knee is extended the biceps femoris may serve as an outward rotator. It will be observed that the muscles whose function it is to execute the angular movements of the thigh, act also as outward rotators, and this double function gives a greater range of motion to the thigh, /.<?., if one of the functions of a group of muscles is rendered unnecessary the whole force can be directed toward the other. Abduction, however, is an exception. To sum up, then, the muscles with their functions we have flexors. ''Pectineus. Obturator Externus Five Accessory, i Vastus Externus. I Sartorius. [Rectus. . Nerve supply: The psoas is supplied by anterior branches