Back to Top. Empiricism is the theory that the origin of all knowledge is sense experience. It emphasizes the role of experience and evidence, especially sensory perception, in the formation of ideas, and argues that the only knowledge humans can have is a posteriori (i.e. based on experience).
Answer: The sciatic nerve divides into the tibial and common peroneal nerves at the lower third of the thigh. When an injection is done in the popliteal fossa space, the provider should indicate what structure he or she is trying to block.
Because the sciatic nerve which innervates the posterior leg, runs between the piriformis muscle and the obturator foramen which is the opening where the sciatic nerve passes through to go from the anterior of the sacrum to beneath the gluteus maximus and then down the leg,