The dissector's manual of practical and surgical anatomy / By Erasmus Wilson.

  • Wilson, Erasmus, Sir, 1809-1884.
Date:
1856
Catalogue details

Licence: Public Domain Mark

Credit: The dissector's manual of practical and surgical anatomy / By Erasmus Wilson. Source: Wellcome Collection.

Provider: This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.

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    costals, and two branches of the first lumbar nerve, namely, the ilio-hy}>o«iastric, and ilio-inguinal. The intercostal nerves pass from the intercostal spaces, be- tween the internal oblique and transversalis muscle, to the front of the abdomen, where they enter the sheath of the rectus. Near the linea alba they terminate by piercing the sheath, and becom- ing the anterior cutaneous nerves (page 32). Midway between the vertebral column and linea alba, each in- tercostal nerve gives off its lateral cutaneous branch, which pier- ces the internal and external oblique muscles to reach the sur- face (page 31). The last intercostal, or rather, the last dorsal nerve, lies below the last rib ; its lateral cutaneous brancli does not divide like the rest, but is continued over the crest of the ilium, to the integu- ment of the hip. The ilio-hypogastric nerve pierces the transversalis just above the crest of the ilium, and a little posterior to its mid-point, and divides into its two branches, iliac and liypogastric. The iliac branch pierces the internal and external oblique muscles, and descends over the crest of the ilium, to be distributed to the in- tegument of the gluteal region. The hypogastric branch continues its course forward, a little above the crest of the ilium ; and, near the anterior superior spine, communicates with the ilio-inguinal nerve. It then pierces the internal oblique muscle, and, near the linea alba, the aponeurosis of the external oblique, and is distributed to the integument of the hypogastric region. The ilio-inguinal nerve^ smaller than the preceding, and infe- rior to it in position, pierces the transversalis muscle in front of the anterior superior si)ine of the ilium, and communicates with the hypogastric branch of tlie ilio-hypogastric nerve. It then pierces tlie internal oblique muscle, and, passing through tlie external abdominal ring with the spermatic cord, is distributed to the integument of the up])er and inner part of the thigh, and to the neighboring part of the scrotum or pudendum. Tlio vessels ami nerves of tlie abdominal parietes having been carefully studied, the dissector should examine the lower border of the transver- salis muscle, and its relations to the internal oblique muscle (which has been already turned aside, but may be replaced for this examination) and to the spennatic cord. The latter will be found issuing fwm beneath the lower border of the muscle, between it and Poupart's ligament. l''ollowing the curve formed by tlie lower border of the muscle, he will liud it descend bidiind the sptn-matic cord and Poujiart's ligament, to be inserted, in lojijuiutioii with the internal oblitiue muscle, into the pec- lineal line of thepubt's behind (Jimbernat's ligament. The membranoiis strueture which occupies the interval between the lower border of the transversalis and Poupart's liganu'ut is the transremolia fativia, which is next to be I'xamined. For this purpose the transvei-salis should be sepa-