Treatment for sigmoid volvulus may include sigmoidoscopy. Initial treatment for sigmoid volvulus may occasionally occur via sigmoidoscopy or with a barium enema. The rectum and sigmoid colon can absorb magnesium. Sigmoidocele is a prolapse of peritoneum that contains a section of sigmoid colon. The rectum is a continuation of the sigmoid colon, and connects to the anus. These are usually intussusceptions that originate in the upper rectum or lower sigmoid. Sigmoidoscopy is a common diagnostic technique used to examine the sigmoid colon. Note that a superior petrosal sinus enters the junction of the transverse and sigmoid sinuses. The sigmoid drains into the large internal jugular veins. This included an operation on November 5, 1941, which found "carcinoma of the rectal sigmoid". A sigmoid function is a mathematical function having a characteristic "S"-shaped curve or sigmoid curve. The logistic function is also known as the sigmoid function. The neck had a pronounced sigmoid curve. The function performs the element-wise logistic sigmoid operation. There are a number of types of SVM such as linear, polynomial, sigmoid etc.