This may be the best article on the Foot I have ever read!!  

Summary: "Global movements are brain based patterns rather than simple force based bone reactions!! Any models of movement prediction, mapping or injury causation are at best a guess using foot pronation. This does not mean that foot pronation does not have any importance or impact on the whole kinetic chain but it is certainly not a consistent or predictable reaction amongst individuals."

http://www.cor-kinetic.com/biomechanics-bs-can-you-predict-injury-or-pain/