Kahn Michelle B, Williams Gavin, Mentiplay Benjamin F, Bower Kelly J, Olver John, Clark Ross A
From the Department of Physiotherapy, Epworth Rehabilitation, Epworth Healthcare, Melbourne (MBK, GW); School of Health and Sport Sciences, University of Sunshine Coast, Sunshine Coast (MBK, RAC); School of Physiotherapy, The University of Melbourne, Melbourne (GW, KJB); La Trobe Sport and Exercise Medicine Research Centre, La Trobe University, Melbourne (BFM); and Epworth Monash Rehabilitation Unit (EMReM), Melbourne, Australia (JO).
Am J Phys Med Rehabil. 2021 Mar 1;100(3):235-242. doi: 10.1097/PHM.0000000000001551.
The aims of this study were to (1) evaluate the relationships between stationary and dynamic associated reaction (AR) tests in people with acquired brain injury using surface electromyography (sEMG) muscle activity and three-dimensional motion analysis kinematic measures and (2) assess the test-retest reliability of sEMG and seated tests of ARs.
Forty-two adults with acquired brain injury underwent AR testing with seated contralateral maximal voluntary isometric contraction tests and walking (self-selected and fast speeds). Associated reaction measurements included biceps brachii sEMG, elbow goniometry, and three-dimensional motion analysis kinematics during walking. Pearson correlations evaluated the relationships between seated and dynamic walking AR tests and between muscle activity and kinematic measures. Chronic participants were reassessed 1 wk later for reliability.
A strong (r = 0.65) and moderate (r = 0.53) relationship existed for biceps brachii sEMG during seated and walking tests at self-selected and fast walk, respectively. A weak to moderate relationship existed between biceps brachii sEMG and kinematics during walking and between seated and walking measures of ARs (r = 0.23-0.53). All tests had strong to very strong test-retest reliability (intraclass correlation coefficients, >0.78).
Seated contralateral maximal voluntary isometric contraction tests correlate only weakly to moderately with AR walking kinematics and moderately to strongly with biceps brachii activation during walking. Moderate relationships exist between sEMG and kinematics, indicating that they may provide different information for ARs.
本研究的目的是：（1）使用表面肌电图（sEMG）肌肉活动和三维运动分析运动学测量方法，评估获得性脑损伤患者的静态和动态关联反应（AR）测试之间的关系；（2）评估sEMG和AR坐位测试的重测信度。
42名获得性脑损伤的成年人接受了AR测试，包括坐位对侧最大自主等长收缩测试和步行（自选速度和快速）。关联反应测量包括肱二头肌sEMG、肘部角度测量以及步行过程中的三维运动分析运动学。Pearson相关性评估坐位和动态步行AR测试之间以及肌肉活动和运动学测量之间的关系。慢性参与者在1周后重新评估以确定信度。
在自选速度和快速步行的坐位和步行测试中，肱二头肌sEMG分别存在强相关（r = 0.65）和中等相关（r = 0.53）。步行过程中肱二头肌sEMG与运动学之间以及坐位和步行AR测量之间存在弱至中等相关（r = 0.23 - 0.53）。所有测试的重测信度都很强至非常强（组内相关系数，>0.78）。
坐位对侧最大自主等长收缩测试与AR步行运动学的相关性仅为弱至中等，与步行过程中肱二头肌激活的相关性为中等至强。sEMG与运动学之间存在中等相关性，表明它们可能为AR提供不同信息。
