Which sensory distribution corresponds to L5 nerve root?

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Multiple Choice

Which sensory distribution corresponds to L5 nerve root?

The key idea is knowing where each nerve root provides sensation in the leg. The L5 dermatome covers the dorsum of the foot and the lateral aspect of the lower leg. This pattern matches the option describing a lateral leg with a dorsum of the foot, because L5 is responsible for sensation in those regions, distinguishing it from other roots. The medial leg/foot distribution fits L4, and the lateral foot with the plantar surface fits S1. The combination of lateral leg and dorsum of the foot is characteristic of L5, making that option the best match.

The key idea is knowing where each nerve root provides sensation in the leg. The L5 dermatome covers the dorsum of the foot and the lateral aspect of the lower leg. This pattern matches the option describing a lateral leg with a dorsum of the foot, because L5 is responsible for sensation in those regions, distinguishing it from other roots.

The medial leg/foot distribution fits L4, and the lateral foot with the plantar surface fits S1. The combination of lateral leg and dorsum of the foot is characteristic of L5, making that option the best match.

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