Rochefort Coralie, Walters-Stewart Coren, Aglipay Mary, Barrowman Nick, Zemek Roger, Sveistrup Heidi
University of Ottawa, School of Human Kinetics, Faculty of Health Sciences, Canada.
Children's Hospital of Eastern Ontario Research Institute, Canada.
J Sci Med Sport. 2017 Nov;20(11):970-975. doi: 10.1016/j.jsams.2017.04.008. Epub 2017 Apr 22.
To determine if self-reported balance symptoms can be used as a proxy for measures of the center of pressure (COP) to identify balance deficits in a group of concussed adolescents.
Case-control.
Thirteen adolescents 1-month post-concussion who reported ongoing balance problems (Balance+), 20 adolescent 1-month post-concussion who reported no balance problems (Balance-), and 30 non-injured adolescents (control) completed a series of balance tests. Participants completed two 2-min trials standing on a Nintendo Wii Balance Board™ during which the COP under their feet was recorded: i) double-leg stance, eyes open; ii) double-leg stance, eyes closed. Participants also completed a dual-task condition combining a double-leg stance and a Stroop Colour-word test.
Participants in both the Balance+ and Balance- group swayed over a larger ellipse area compared to the control group while completing the Eyes Closed (Balance+, p=0.002; Balance-, p=0.002) and Dual-Task (Balance+, p=0.001; Balance-, p=0.004) conditions and performed the Dual-Task condition with faster medio-lateral velocity (Balance+, p=0.003; Balance-, p=0.009). The participants in the Balance- group also swayed over a larger ellipse area compared to the control group while completing the Eyes Open condition (p=0.005). No significant differences were identified between the Balance+ and Balance- groups.
At 1-month post-concussion, adolescents demonstrated balance deficits compared to non-injured adolescents regardless of whether they reported balance problems. These results suggest that self-reported balance status might not be an accurate reflection of balance performance following a concussion in adolescents.
确定自我报告的平衡症状是否可作为压力中心（COP）测量指标的替代指标，以识别一组脑震荡青少年的平衡缺陷。
病例对照研究。
13名脑震荡后1个月报告持续存在平衡问题的青少年（平衡+组）、20名脑震荡后1个月报告无平衡问题的青少年（平衡-组）和30名未受伤的青少年（对照组）完成了一系列平衡测试。参与者在任天堂Wii平衡板™上站立完成两次2分钟的测试，期间记录其脚下的COP：i）双脚站立，睁眼；ii）双脚站立，闭眼。参与者还完成了一项将双脚站立与斯特鲁普颜色-文字测试相结合的双重任务。
在完成闭眼（平衡+组，p=0.002；平衡-组，p=0.002）和双重任务（平衡+组，p=0.001；平衡-组，p=0.004）测试时，平衡+组和平衡-组的参与者相比对照组在更大的椭圆区域内摆动，并且在双重任务测试中表现出更快的中外侧速度（平衡+组，p=0.003；平衡-组，p=0.009）。在完成睁眼测试时，平衡-组的参与者相比对照组也在更大的椭圆区域内摆动（p=0.005）。平衡+组和平衡-组之间未发现显著差异。
脑震荡后1个月，与未受伤的青少年相比，无论是否报告有平衡问题，青少年都表现出平衡缺陷。这些结果表明，自我报告的平衡状态可能无法准确反映青少年脑震荡后的平衡表现。
