Step parameters by group across age. (A) Normalized cycle duration, swing duration, stance duration, and percent stance. (B and C) Mean percentages of lateral or medial (L/M), heel (H), toe (T), or flat (F) part of foot making contact at touch-down for infants with typical development (TD) (B) and infants with myelomeningocele (MMC) (C). (D and E) Mean percentages of lateral or medial (L/M), heel (H), toe (T), or flat (F) part of foot in contact with belt during mid-stance (mid-ST) for infants with TD (D) and infants with MMC (E).