This document discusses various nerve blocks of the lower extremity and paravertebral blocks. It begins by describing techniques for localizing neural structures such as paraesthesia, nerve stimulation, and ultrasound guidance. It then discusses the nerve supply and blocks for specific nerves in the lower extremity including the lumbar plexus, sacral plexus, femoral nerve, lateral femoral cutaneous nerve, obturator nerve, saphenous nerve, sciatic nerve, and ankle blocks. It also covers psoas compartment blocks, parasacral blocks, and popliteal fossa blocks. Finally, it discusses thoracic and lumbar paravertebral blocks including relevant anatomy, techniques, indications, contraindications, and complications.