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Diurnal changes in postural control in normal children: Computerized static and dynamic assessments

Burns & Trauma 2014年第3期2卷 130-135页

作者： Sophie Bourelle redha taiar Benoit Berge Vincent Gautheron Jerome Cottalorda Department of Pediatric Surgery University Hospital of Reims Department of Sport Sciences University of Reims Champaign Euraxi Pharma Joué-Lès-Tours Physical and Rehabilitation Medicine Service University Hospital Saint-Etienne Department of Orthopaedic Pediatric and Plastic Surgery University Hospital MontpellierFrance

Mild traumatic brain injury (mTBI) causes postural control deficits and accordingly comparison of aberrant postural control against normal postural control may help diagnose mTBI. However, in the current literature, little is known regarding the normal pattern of postural control in young children. This study was therefore conducted as an effort to fill this knowledge gap. Eight normal school-aged children participated. Posture assessment was conducted before (7-8 a.m. in the morning) and after (4-7 p.m. in the after-noon) school on regular school days using the Balance Master? evaluation system composed of 3 static tests and 2 dynamic balance tests. A significant difference in the weight-bearing squats was detected between morning hours and afternoon hours (P < 0.05). By end of afternoon, the body weight was borne mainly on the left side with the knee fully extended and at various degrees of knee flexion. A significantly better directional control of the lateral rhythmic weight shifts was observed at the end of the afternoon than at morning hours (P < 0.05). In summary, most of our findings are inconsistent with results from previous studies in adults, sug-gesting age-related differences in posture control in humans. On a regular school day, the capacity of postural control and laterality or medio-lateral balance in children varies between morning and afternoon hours. We suggest that posturographic assessment in children, either in normal (e.g., physical education and sports training) or in abnormal conditions (e.g., mTBI-associated balance disorders), be better performed late in the afternoon.

关键词： Child postural control posturography diurnal patterns trauma prevention

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Effects of Unstable Footwear on Stance Pattern

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Journal of Biosciences and Medicines 2014年第3期2卷 20-24页

作者： M. A. Choukou S. Ghouli F. C. Boyer R. taiar Laboratoire de Biomécanique GRESPI Université de Reims-Champagne Ardenne Reims France

Inadequate safety shoe wearing is thought to be responsible of many musculoskeletal disorders. A new concept of unstable footwear is proposed to reduce mechanical stresses during work. Major expectations argue for a better ankle dynamic behavior leading to an increased muscular activity. The aim of this study was to evaluate the variation of stance characteristics while walking on level ground as a function of the models of safety shoes. Twenty healthy males (aged 23.6 ± 7) were asked to make six gait cycles on a walking track while barefoot, shod with low cost safety footwear, high cost one, and equipped by Masa? Barefoot Technology shoes (the most unstable footwear). Stance phases (heel strike, flat foot and toe-off) have been normalized as percentages of the maximum value of ground reaction force recorded during each step. The highest significant percentages have been observed in Masa? Barefoot Technology shoes condition and only during heel strike (8% to 10.1% higher) and toe-off (10% to 11.3% higher). In contrast, the temporal durations of the three stance phases were not significantly different between the four conditions. The convexity of safety shoe induces less stability increasing the adaptation of the muscle activity of the wearer at heel-strike and toe-off in order to regain stable gait pattern.

关键词： Gait Barefoot Convex Shoes Pain

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