Figure 2: Representation of the Embryogenesis of the Popliteal Artery and Gastrocnemius muscle. The medial head of the gastrocnemius is seen to migrate laterally across the femoral condyles, eventually resting on the medial femoral condyle. As this happens the original axial artery deep to popliteus disappears, and is replaced by the new artery now superficial to popliteus. (Figures reproduced from Levien et al. with permission [6]).