Frontal Plane Relationship of the Forefoot - a relationship established by projecting the Calcaneal Bisector onto an imagery line drawn parallel to the plantar aspect of the all metatarsal heads when the subtalar joint is placed in its neutral position and both axes of the midtarsal joint are fully pronated (locked).  In some instances, the line across the metatarsal heads is modified by elevated or depressed metatarsal heads.  The forefoot frontal plane relationship may be perpendicular (neutral forefoot), inverted (varus), or everted (valgus).