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.
The sciatic nerve systems are located in in the lumbar and the sacral regions of the spine. Sciatic pain or sciatica can be described as sharp, dull, burning, tingly, numb, continuous, or intermittant and usually affects only one side of the body. It can radiate the entire length of the nerve, in some cases all the way down to the toes.