الفهرس 
Impact of different foot deformities on the inverted pendulum analogy in children with cerebral palsy
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Abstract
The aim of this study was to investigate the impact of selected four of gait deviations based on specific foot deformities; equinus, valgus, varus and dorsiflexion (DF)on efficiency of inverted pendulum analogy in children with bilateral spastic cerebral palsy (CP). Methods:Fiftysix ambulant children with bilateral spastic CP and twentytwo typically developing children as a control group (CG) participated in this study. Children with CP had any kind of the selected gait deviations. They were categorized according to kind of gait deviations based on foot problem into four groups; equinus group (n=23), valgus group (n=13), varus group (n=10) and DF group (n=10). Equinus group was categorized according to severity of equinus into two sub-groups. 3D gait analysis was conducted to measure the vertical displacement of center of mass (COM) for all children as well as spatial-temporal parameters. Results revealed a statistically significant increase of vertical displacement of COM in children with CP in the all groups compared to body mass index (BMI)-matched CG (P-value was 0.01108and 0.00736 fortwo sub-groups of equinus PG, 0.00328 for valgus group, 0.00034 forvarus group and 0.00086 for DF group). Moreover, no significant difference of COM displacement was found among groups and also no difference was detected between two sub-groups of equinus gait. Conclusion, the vertical COM displacement increased significantly in children with bilateral spastic CP with gait deviation based on foot deformity compared to BMI-matched CG regardless the kind of foot deformity