Navegando por Palavras-chave "Kinematic"

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    Ajustes posturais antecipatórios e estratégias de equilíbrio em crianças com paralisia cerebral durante o pediatric reach test
    (Universidade Federal de São Paulo, 2014-08-27) Soares, Leiliane Monika dos Santos [UNIFESP]; Carvalho, Raquel de Paula [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    Cerebral palsy (CP) characterizes a group of disorders of the development of posture and movement due to a non-progressive disturbance in immature brain. It is frequent that children show deficits in postural control. There is interest in knowledge about movement strategies used during anterior reaching until the limit of stability that justifies the lower performance of children with CP. The aim of this study was to evaluate the motor strategies used by children with CP during the Pediatric Reach Test (PRT). This cross-sectional, non probabilistic study was composed of a convenience selected sample of 28 children, aged between 6 and 14 years old, 14 with clinical diagnosis of CP, classified as I and II according to the Gross Motor Function Classification System (GMFCS) in CP group (CPG) and 14 with typical motor development in the control group (CG), paired by gender and age. After anthropometric data collected, children were evaluated by PRT, in combination with image capture and electromyographic for further analysis. Kinematic variables (displacement of the styloid process, time, mean velocity and deceleration index), angular variables (initial and final angle of the shoulder, hip, knee and ankle) and also electromyographic variables (latency and magnitude of muscle activation in anticipatory (APA) and compensatory postural adjustment (CPA) of the tibialis anterior, rectus femoris, lateral gastrocnemius, biceps femoris and erector spinae. For the kinematic analysis we used t-Student and for the electromyographic analysis the Mann-Whitney was used. Significance level of 5% was adopted. There was no difference between groups for weight and height variables, showing homogeneity of the sample. The CPG showed lower displacement, time and mean velocity, and higher deceleration index. The angular variables showed that both groups used the same strategy of motion, but the CPG showed greater initial flexion of shoulder, knee and ankle, characterizing the crouch posture. There were no differences between groups for muscle latency and magnitude of muscle activation in APA and CPA. We conclude that children with CP have lower performance in the PRT, with less motion control compared to their peers with typical motor development, and those changes of alignment evidenced by children with CP generate compensatory mechanisms that reflect the decreased efficiency of anterior reaching movement.