The furrow of the sigmoid sinus

The sigmoid sinus groove is an anatomical feature that is defined as the sinus groove that runs from the top of the spine to the anterior wall of the pelvis. It is located between the superior and inferior paresis veins and is one of the most important components of venous drainage of the pelvic area and small intestine.

The groove of the sigmoid vein is formed when the inferior vena cava turns and crosses the posterior wall of the upper longitudinal muscular layer of the spine. It then passes through the obturator externus tendon along the circular level of the greater sciatic notch, where it forms the falciform groove. This falciform groove becomes more obvious when the superior cava muscle surrounds the inferior vena cava superiorly and inferiorly.

An important function of the groove of the sigmoid vein is to drain blood from the small intestine and external genitalia through the inferior rectal vein. In addition, it helps protect the lower hollow and large berry