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 Popliteal artery: A branch of the femoral artery, the popliteal artery branches further to supply blood to the knee, thigh, and calf. 2  It ends at the anterior and posterior tibial arteries. 3  Posterior tibial artery: This branch of the popliteal artery supplies oxygenated blood to the leg and sole of the foot.n Depth: Vessels. Once blood is oxygenated in the lungs, it returns to the heart and is then pumped throughout the body. A web of blood vesselsâarteries, veins, and capillariesâcirculate blood to organs, muscles, bones, and other tissues.