There are specific somatic dysfunctions that lead to leg length differences. These effects include the sacral base tilting toward the side of the short leg, a low iliac crest on the short leg side, a forward rotation of the innominate on the shorter side and/or a posterior rotation of the innominate on the side of the longer leg as a compensatory measure. The lumbar spine will develop a convexity toward the side of the short leg.6 Their definitions are as follows: