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.
These muscles flex, or bend, the knee. The popliteus is a muscle that runs diagonally across the back of the knee, underneath the hamstrings, from the lateral femur to the medial tibia. Its function is to âunlockâ the knee by providing slight rotation at the knee as it moves between flexion and extension.