Which of the following spinal dermatome level corresponds with the landmark of the inguinal ligament?

Question

Options

• AT10
• BL1
• CL3
• DL5

• A
  9% (5)
• B
  84% (47)
• C
  2% (1)
• D
  5% (3)

Explanation

L1 innervates the inguinal (groin) region, and the inguinal ligament runs along the crease between the abdomen and thigh - precisely within the L1 dermatome distribution.

Why the distractors are wrong:

• T10 corresponds to the umbilicus (navel), not the groin - it's too high.
• L3 covers the medial thigh and area around the knee - further down the leg.
• L5 supplies the lateral lower leg and dorsum of the foot - much more distal.

Memory tip: Think "L1 = One ligament in the groin" or use the landmark ladder: T10 = belly button → L1 = inguinal ligament → L3 = knee → L5 = foot dorsum. Anchoring each level to its landmark in order makes the whole sequence easier to recall under pressure.

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