In the course of numerous operations for the relief of oblique inguinal hernia, Dr. Alexander Hugh Ferguson of this city has observed: 1, that with but few exceptions there was a marked deficiency in the origin of the internal oblique and the transversalis muscles from Poupart's ligament; 2, that these muscles arising only from the outer portion of Poupart's ligament, with their lower fibers deficient in number and strength, afforded but poor protection, if any, to the internal abdominal ring; 3, that a strong barrier being thus removed, the descent of the hernia through the internal ring and downward along the inguinal canal was greatly facilitated.
Nearly every writer on hernia makes the statement that the hernia in its descent pushes the arched fibers of the internal oblique and the transversalis muscles out of its way, displacing them outward and upward. Dr. Ferguson, while granting that the muscles are to
TURCK RC. SURGICAL ANATOMY OF HERNIA.OBSERVATIONS THEREON, WITH RESULTS OF FIFTY DISSECTIONS.. JAMA. 1899;XXXII(15):793–800. doi:10.1001/jama.1899.92450420001001
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