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.
Sciatica. The sciatic nerve runs from the spinal cord to the hips and buttocks and down the back of each leg. So, sciatica may manifest as lower back, hip, or leg pain along the sciatic nerve pathway.