Objective:
\nTo assess static postural control in eyes-open and eyes-closed conditions in
\n4 individuals with osteogenesis imperfecta (OI) type I as compared to typically developing (TD) 5 individuals. The second aim was to explore the relation between postural control and lower-limbs 6 muscle function.
\nDesign:
\nThis is a cross-sectional study. Settings: The study was carried out in 7 the outpatient department of a pediatric orthopedic hospital.
\nParticipants:
\n22 individuals with OI 8 type I (mean age [range]: 13.1 [6-21] years) and 16 typically developing (TD) individuals (mean 9 age [range]: 13.1 [6-20] years) participated in the study. A convenience sample of participants 10 was selected. Participants were eligible if they were between 6 and 21 years and if they did not 11 have any fracture or surgery in the lower limb in the 12 months prior to testing. Main Outcomes 12
\nMeasures:
\nPostural control was assessed through static balance tests and muscle function 13 through mechanograhic tests, on a force plateform. Selected postural parameters were: path 14 length and velocity, 90% confidence ellipse area and the ellipse\u2019s medio-lateral and antero15 posterior axes length. Mechanographic parameters were peak force (kN) and peak power (kW) 16 as measured in the Multiple Two-Legged Hopping and the Single Two-Legged jump, 17 respectively.
\nResults:
\nOI type I had poorer postural control than TD as indicated by longer and 18 faster displacements and a larger ellipse area. Muscle function was unrelated to postural control 19 in the OI group. Removing visual information resulted in a larger increase in postural control 20 parameters for the OI group compared to the TD group.
\nConclusions:
\nA proprioceptive deficit is 21 suggested to explain decreased postural control in individuals with OI type I.<\/p>\n","protected":false},"excerpt":{"rendered":"
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