FIGURE 1.

Arterial and nervous structures at the level of the greater ischiadic notch – left medial view. 1-5: anterior branches of the sacral nerves, immediately after their emergence through the anterior sacral foramina; 6: left inferior hypogastric plexus; 7: sacro-ischiadic ligament; 8: left superior gluteal artery; 9: left inferior gluteal artery; 10: left internal pudendal artery; 11: left sympathetic sacral chain; 12: left internal iliac artery. The red dotted line shows the border of the greater ischiadic notch