During midgut herniation, the gut rotates by how many degrees counterclockwise?

During midgut herniation, the gut rotates by how many degrees counterclockwise?

• A. 90 degrees counterclockwise
• B. 180 degrees clockwise
• C. 270 degrees clockwise
• D. 360 degrees counterclockwise

Answer: (A)

Midgut rotation during early development occurs around the superior mesenteric artery and happens in two stages. In the first stage, as the gut herniates into the umbilical cord, it makes a 90-degree counterclockwise turn. This initial rotation sets up the basic arrangement of the intestinal loops. Later, when the intestines return to the abdomen, they undergo an additional 180-degree counterclockwise rotation, bringing the total to 270 degrees. So, the rotation during the midgut herniation stage is 90 degrees counterclockwise.

Midgut rotation during early development occurs around the superior mesenteric artery and happens in two stages. In the first stage, as the gut herniates into the umbilical cord, it makes a 90-degree counterclockwise turn. This initial rotation sets up the basic arrangement of the intestinal loops. Later, when the intestines return to the abdomen, they undergo an additional 180-degree counterclockwise rotation, bringing the total to 270 degrees. So, the rotation during the midgut herniation stage is 90 degrees counterclockwise.