S2 Dermatome

**Semantic type:** Embryonic Structure

**Definition:** The area of the skin innervated by the second sacral spinal nerve, covering the posterior aspect of the thigh and the upper portion of the calf. This dermatome extends vertically along the back of the leg, providing sensory innervation to the skin in these regions.

**Synonyms:** - S2 DERMATOME - S2 Nerve Root Dermatome