Figure 2: A scheme of locating the reflexology area of lumbar vertebrae on foot. Rectangle (abcd) representing the reflexology area. A: tip of great toe; B: calcaneus; C: just anterior to medial malleolus; D: below sustentaculum tali; E: centroid of abcd. AB = 23 cm and CD = 7 cm. The lengths AB and CD were considered to be standard dimensions of the referred foot.