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.
1 The sciatic nerve is the largest nerve in the body. 2  Sciatica pain is typically felt from the low back to behind the thigh and radiating down below the knee. 3  Treatments for sciatica depend on the underlying cause and the severity of the pain.ciatica facts. 1  Sciatica is nerve pain from irritation of the sciatic nerve. 2  The sciatic nerve is the largest nerve in the body. 3  Sciatica pain is typically felt from the low back to behind the thigh and radiating down below the knee.