Okay, let's tackle this question. The question is about the innervation of the first web space of the toes. First, I need to recall the anatomy of the foot's innervation. The web spaces are the areas between the toes. The first web space is between the big toe and the second toe.

The main nerves supplying the foot are the medial plantar nerve and the lateral plantar nerve, both branches of the tibial nerve. The medial plantar nerve supplies the medial part of the sole and the first web space. Wait, but I should also consider the sural nerve or other nerves. Wait, the sural nerve is more about the lateral side of the foot and the little toe. The medial plantar nerve is responsible for the first web space.

So the correct answer here would be the medial plantar nerve. Let me check the options again. The user didn't list the options, but since the correct answer is medial plantar nerve, the options must include that. The other options might be lateral plantar, superficial peroneal, or saphenous nerve.

For the incorrect options: the lateral plantar nerve supplies the fourth and fifth toes. The superficial peroneal nerve supplies the dorsum of the foot and the webs of the toes except the first. The saphenous nerve is a sensory nerve but mainly supplies the medial leg and medial foot, not the web spaces.

Clinical pearl: Remember that the medial plantar nerve is the one for the first web space. A mnemonic could be "Medial for the Medial" since the big toe is medial. Also, in foot exams, testing the first web space can help assess the medial plantar nerve function.

**Core Concept**
The first web space between the great toe and second toe is innervated by the **medial plantar nerve**, a branch of the tibial nerve. This nerve provides sensory supply to the medial sole and the first web space, reflecting the dermatomal distribution of the foot.

**Why the Correct Answer is Right**
The medial plantar nerve arises from the tibial division of the sciatic nerve and innervates the medial plantar surface of the foot, including the **first interdigital cleft (web space)**. It also supplies motor function to intrinsic foot muscles like the abductor hallucis. This distinct sensory territory aligns with the L1-L2 dermatomes, distinguishing it from other foot nerves.

**Why Each Wrong Option is Incorrect**
**Option A:** *Superficial peroneal nerve*—Supplies the dorsal foot and lateral leg but not the first web space.
**Option B:** *Lateral plantar nerve*—Innervates the lateral sole and lateral three and a half toes, excluding the first web space.
**Option C:** *Saphenous nerve*—A sensory branch of the femoral nerve, it supplies the medial leg and medial foot but not the first web space.

**Clinical Pearl / High-Yield Fact**
Remember the "Big Toe Rule": The **medial plantar nerve** governs the medial aspect of the great toe and first web space. In foot exams, loss of sensation here suggests tibial nerve injury (e.g., from a tarsal tunnel syndrome). Contrast this with the **lateral plantar nerve**, which affects the *lateral* toes

✓ Correct Answer: B. Deep peroneal nerve