Medial umbilical ligaments vs Median umbilical ligament and lateral umbilical folds
How to tell Medial umbilical ligaments and Median umbilical ligament and lateral umbilical folds apart when a board question makes them look alike.
Medial ligaments are umbilical arteries; median ligament is urachus; lateral folds contain inferior epigastric vessels.
Side by side
Medial umbilical ligaments are obliterated umbilical arteries and run lateral to the median ligament.
The median umbilical ligament is the urachal remnant; lateral umbilical folds are peritoneal folds over inferior epigastric vessels, not obliterated fetal vessels.
Paired fetal umbilical arteries close after birth and persist as medial umbilical ligaments.
The urachus becomes the single median umbilical ligament; inferior epigastric vessels create the lateral umbilical folds.
Medial umbilical ligaments are paired obliterated umbilical arteries; they are lateral to the median ligament and medial to the lateral umbilical folds.
Median = urachus. Lateral fold = inferior epigastric vessels.
The trap
Medial is umbilical arteries; median is urachus; lateral fold is inferior epigastric vessels.
The repair move
Before naming the answer, force the stem through the separator: Medial is umbilical arteries; median is urachus; lateral fold is inferior epigastric vessels.
Try a free question
CoreA medical student is identifying peritoneal folds on the anterior abdominal wall during gross anatomy. Two paired folds lateral to the midline run from the umbilicus toward the bladder, and they contain remnants of the obliterated umbilical arteries. Which structures are these?
Show answer and explanation
Answer: A. Medial umbilical ligaments (obliterated umbilical arteries). Medial umbilical ligaments are paired peritoneal folds lateral to the midline containing the obliterated umbilical arteries (fetal arteries that returned blood to placenta). They are MEDIAL to the lateral umbilical folds (inferior epigastric vessels) and LATERAL to the median umbilical ligament (urachus).
Why the other choices are tempting
- B. Median umbilical ligament is the single MIDLINE remnant of the urachus (allantois remnant).
- C. Lateral umbilical folds are LATERAL to the medial umbilical ligaments and contain inferior epigastric vessels.
- D. Falciform ligament is a peritoneal fold attaching the liver to the anterior abdominal wall and contains the ligamentum teres (round ligament of liver, remnant of umbilical vein).
- E. Ligamentum teres hepatis is the obliterated umbilical vein within the falciform ligament edge.
Flashcards
Tap a card to flip it.
What clue supports Medial umbilical ligament?
Choose Medial umbilical ligament when the stem gives this pattern: Medial umbilical ligaments are obliterated umbilical arteries and run paired on the anterior abdominal wall.
What clue supports Median and lateral umbilical ligaments?
Choose Median and lateral umbilical ligaments when the stem gives this contrasting pattern: Median umbilical ligament is obliterated urachus; lateral umbilical folds contain inferior epigastric vessels and are not obliterated fetal vessels.
Quick answers
What is the fastest way to tell Medial umbilical ligaments from Median umbilical ligament and lateral umbilical folds?
Medial ligaments are umbilical arteries; median ligament is urachus; lateral folds contain inferior epigastric vessels.
What is the key clue for Medial umbilical ligaments?
Medial umbilical ligaments are obliterated umbilical arteries and run lateral to the median ligament.
What is the key clue for Median umbilical ligament and lateral umbilical folds?
The median umbilical ligament is the urachal remnant; lateral umbilical folds are peritoneal folds over inferior epigastric vessels, not obliterated fetal vessels.
What is the common trap with Medial umbilical ligaments vs Median umbilical ligament and lateral umbilical folds?
Medial is umbilical arteries; median is urachus; lateral fold is inferior epigastric vessels.