Illustrations of Forefoot Valgus/Plantarflexed First Metatarsal
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Illustration of Contact with Ground of High Forefoot Valgus or Plantarflexed First Metatarsal
Illustration of Subtalar Joint Supination as Compensation of FF Valgus/PFFR
The contact phase supination produced by these deformities is deadly to lower extremity biomechanics. This supination or heel inversion causes external talar rotation when the limb is internally rotating. It also produces knee extension when it should be flexing and makes the foot rigid and stiff when it should be flexible and absorbing shock.
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