. An analytical compendium of the various branches of medical science, for the use and examination of students. Anatomy; Physiology; Surgery; Obstetrics; Medicine; Materia Medica. %\ 14 OBSTETRICS. Fig. ilium. To different parts of the crest are attached the oblique and transverse abdominal muscles, the latissimus dorsi, the erector spinae, and the quadratus lumborum. It terminates anteriorly, in the ante- rior superim' spinous process, and anterior inferior spinous pro- cess,{*,'^) and posteriorly in the posterior superior and infericrr spinous ^,"^) The anterior superior
. An analytical compendium of the various branches of medical science, for the use and examination of students. Anatomy; Physiology; Surgery; Obstetrics; Medicine; Materia Medica. %\ 14 OBSTETRICS. Fig. ilium. To different parts of the crest are attached the oblique and transverse abdominal muscles, the latissimus dorsi, the erector spinae, and the quadratus lumborum. It terminates anteriorly, in the ante- rior superim' spinous process, and anterior inferior spinous pro- cess,{*,'^) and posteriorly in the posterior superior and infericrr spinous ^,"^) The anterior superior spinous process gives attach- ment to one end of Pouparfs or Gimbernafs ligament, the tensor vagince femoris, and the sartorius muscles. From the anterior infe- rior arises the longer portion of the rectus femoris. Into the posterior are inserted strong ligaments, which bind this bone very firmly to the sacrum. Below the posterior inferior spinous process there is a deep arch, the sciatic notch, which is divided by ligaments into the two sciatic foramina; through the itpper, which is the larger, pass the gluteal, sciatic, and pudic arteries, the sciatic and pudic nerves, and the pyriform muscle; through the inferior, the pudic arteries and nerve re-enter the pelvis, and the obturator internus muscle passes out. The posterior part of the crest is very rough, and marks the connexion between the ilium and sacrum, called the sacro-iliac sym- physis, of which there is one on each side of the sacrum. The body of the bone is divided from the ala internally by a ridge running horizontally,(") forming a portion of the pelvic brim, linea innbmi- nata, or linea ilio-pectinea. The ilium is connected with the ischium and pubis in the acetabulum, and posteriorly with the sacrum. Os ischium, is the second in size, and lowest in position of the divi- sions of the innominatum. It is noted for a base or body, a spinous process, its tuberosity, and ascending ramus. The base, or body, (Fig. 2
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