LKnative - Popliteal sciatic nerve block 
The image displays the peroneal nerve (P) and the tibial nerve (T) just distal to the bifurcation of the sciatic nerve in the popliteal fossa
27 – Use the popliteal artery as a proxy marker
– Locate the pulsating popliteal artery at the level of the popliteal crease
– Look for the tibial nerve between the artery and the skin
– Look for the common peroneal nerve lateral to the tibial nerve
– Track the tibial nerve and the common peroneal nerve proximally until they unite and become the sciatic nerve