Which dermatome is on the dorsum of the foot?

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Multiple Choice

Which dermatome is on the dorsum of the foot?

Explanation:
The key idea is how skin sensation maps to spinal nerve roots (dermatomes). The dorsum of the foot is supplied mainly by the L5 dermatome, with the classic sensory landmark being the web space between the great toe and the second toe. That makes L5 the best fit for the dorsum of the foot. In contrast, L4 tends to cover the medial aspect of the foot and ankle, while S1 covers the lateral foot and the plantar aspect toward the heel. Cervical C6 is a upper-limb dermatome, not applicable to the foot.

The key idea is how skin sensation maps to spinal nerve roots (dermatomes). The dorsum of the foot is supplied mainly by the L5 dermatome, with the classic sensory landmark being the web space between the great toe and the second toe. That makes L5 the best fit for the dorsum of the foot. In contrast, L4 tends to cover the medial aspect of the foot and ankle, while S1 covers the lateral foot and the plantar aspect toward the heel. Cervical C6 is a upper-limb dermatome, not applicable to the foot.

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