LKnative - Popliteal sciatic nerve block 
The green colour depicts the sural nerve
11 – The sural nerve – a branch from the tibial nerve
The sural nerve runs along the postero-lateral aspect of the leg, behind the lateral malleolus and along the lateral aspect of the foot
The sural nerve innervates the skin of the lower lateral calf, lateral border of the foot, and lateral side of the 5th toe