General Anatomy & Embryology · NEET PG Preparation Anatomy
During the formation of the gastrointestinal tract, the midgut undergoes a complex physiological herniation and rotation. What is the total degree an…
Practice question from General Anatomy & Embryology (NEET PG Preparation Anatomy), with the correct answer and a step-by-step solution.
hard · MCQ · Q-7869C9
During the formation of the gastrointestinal tract, the midgut undergoes a complex physiological herniation and rotation. What is the total degree and direction of physiological rotation of the midgut loop around the superior mesenteric artery axis during development?
- A.90 degrees counterclockwise
- B.180 degrees counterclockwise
- C.270 degrees counterclockwiseCorrect answer
- D.360 degrees clockwise
Solution
The midgut loop undergoes a total rotation of 270 degrees in a counterclockwise direction (as viewed from the front) around the axis of the superior mesenteric artery. This occurs in stages: 90 degrees during herniation and 180 degrees upon return to the abdominal cavity.
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