"Rothbarts Foot was discovered by Dr Brian A Rothbart. He first describes the etiology of this foot type in his 2000 patent.  Succinctly, Rothbart discovered the impact the embryological development has on the forefoot andmore specifically, the first metatarsal, proximal phalanx and hallux:

• If the talar head completes its normal ontogenetic development, the first metatarsal head and hallux (big toe) rests on the ground when the subtalar joint is placed in its anatomical neutral position – the plantargrade foot (See Animation Below).

• If the talar head does not complete its normal ontogenetic development, e.g., if the talar head remains in supinatus, the first metatarsal head and hallux are elevated off the ground when the subtalar joint is placed in its anatomical neutral position – the Rothbart’s Foot Structure (See Animation Below).

In this regard, the inventor has observed up to 35mm of dorsal displacement of the medial column.  The twist and dorsal displacement of the medial column is hereinafter referred to as Rothbart’s Foot Structure.” (USPatent #6,092,314 issued July 25, 2000)