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您的检索式：作者名="Nicholas G.Murray"
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| 1 | 稳定与不稳定平台训练对平衡扰动下运动员站姿调控的影响(英文)显示文摘Background:Athletes have been shown to exhibit better balance compared to non-athletes(NON).However,few studies have investigated how the surface on which athletes train affects the strategies adopted to maintain balance.Two distinct athlete groups who experience different types of sport-specific balance training are stable surface athletes(SSA) such as basketball players and those who train on unstable surfaces(USA) such as surfers.The purpose of this study was to investigate the effects of training surface on dynamic balance in athletes compared to NON.Methods:Eight NON,eight SSA,and eight USA performed five 20-s trials in each of five experimental conditions including a static condition and four dynamic conditions in which the support surface translated in the anteroposterior(AP) or mediolateral(ML) planes using positive or negative feedback paradigms.Approximate entropy(Ap En) and root mean square distance(RMS) of the center of pressure(Co P) were calculated for the AP and ML directions.Four 3 × 5(group × condition) repeated measures ANOVAs were used to determine significant effects of group and condition on variables of interest.Results:USA exhibited smaller Ap En values than SSA in the AP signals while no significant differences were observed in the ML Co P signals.Generally,the negative feedback conditions were associated with significantly greater RMS values than the positive feedback conditions.Conclusion:USA exhibit unique postural strategies compared to SSA.These unique strategies seemingly exhibit a direction-specific attribute and may be associated with divergent motor control strategies. | D.S.Blaise Williams Ⅲ Nicholas G.Murray Douglas W.Powell | 2016 | Journal of Sport and Health Science2016，5，1： | 0 |
| 2 | Relationship between the Romberg test and the Wii Fit basic balance test and cognition in athletes with concussion显示文摘Background:Approximately 30%of individuals with a sport-related concussion present with postural instability.Multiple clinical balance tests exist to diagnose postural instability;yet little is known about the potential relationship between these type of postural assessments and cognition post-concussion.Aim:The purpose of the current study was to assess the relationship between the Romberg test,the Wii Fit basic balance test(WBBT),and the composite scores on the Immediate Post-Concussion Assessment and Cognitive Testing(ImPACT)test in a sample of athletes with concussions.Methods:Fifty five post-concussed athletes(40 males)completed the Romberg test(RT)(?/+),the WBBT,and ImPACT test.WBBT performance was operationalized as the number of successfully completed trials(of 5 trials of increasing difficulty)within 30 seconds.Pearson’s and point-biserial correlations examined univariate associations among the variables.Results:The RT and WBBT were not significantly related(r=?0.029,p=0.832).The RT weakly correlated with ImPACT impairment scores(r=0.26,p=0.041),whereas WBBT the number of trials did not(r=?0.20,p=0.155).The RT scores were significantly correlated with ImPACT Visual Processing Speed Score(r=0.27,p=0.036)and Reaction Time score(r=0.34,p=0.006).In contrast,WBBT trials were significantly correlated with the ImPACT Visual Memory Score(r=?0.41,p=0.003).Conclusions:These results suggest that the WBBT and RT assess unique aspects of postural control.The RT may relate directly to single sensory cognitive and motor processing,while the WBBT may relate to multi-sensory visually driven cognitive and motor processing.Relevance for patients:Clinical balance tests could point to different cognitive impairments post-concussion. | Nicholas G.Murray Anthony P.Salvatore Joe Tomaka Rebecca J.Reed-Jones | 2016 | Journal of Clinical & Translational Research2016，2，1： | 0 |
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