In 1997 I reported that I thought Rothbarts Foot and Morton's foot were the same foot structure. However, after several years of further research, this proved not to be the case. Rothbarts Foot and Morton's foot are two entirely different foot structures, and as such, are treated entirely differently.
For more information, you can visit my research website at: http://rothbartsfoot.es/MortonsFoot.html
Prof Brian A Rothbart