Generalization of motor module recruitment across standing reactive balance and walking is associated with beam walking performance in young adults

被引:10
作者
Allen, Jessica L. [1 ]
Carey, Hannah D. [1 ]
Ting, Lena H. [2 ,3 ,4 ]
Sawers, Andrew [5 ]
机构
[1] West Virginia Univ, Dept Chem & Biomed Engn, 1306 Evansdale Dr,POB 6102, Morgantown, WV 26506 USA
[2] Emory Univ, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30322 USA
[3] Georgia Inst Technol, Atlanta, GA 30332 USA
[4] Emory Univ, Sch Med, Dept Rehabil Med, Div Phys Therapy, Atlanta, GA USA
[5] Univ Illinois, Dept Kinesiol & Nutr, Chicago, IL USA
基金
美国国家卫生研究院; 美国国家科学基金会;
关键词
Muscle synergy; Electromyography; Muscle coordination; Gait; Postural control;
D O I
10.1016/j.gaitpost.2020.09.016
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Background: Recent studies provide compelling evidence that recruiting a common pool of motor modules across behaviors (i.e., motor module generalization) may facilitate motor performance. In particular, motor module generalization across standing reactive balance and walking is associated with both walking speed and endurance in neurologically impaired populations (e.g., stroke survivors and individual's with Parkinson's disease). To test whether this phenomenon is a general neuromuscular strategy associated with well-coordinated walking and not limited to motor impairment, this relationship must be confirmed in neurologically intact adults. Research Question: Is motor module generalization across standing reactive balance and walking related to walking performance in neurologically intact young adults? Methods: Two populations of young adults were recruited to capture a wide range of walking performance: professionally-trained ballet dancers (i.e., experts, n = 12) and novices (n = 8). Motor modules (a.k.a. muscle synergies) were extracted from muscles spanning the trunk, hip, knee and ankle during walking and multidirectional perturbations to standing. Motor module generalization was calculated as the number of modules common to these behaviors. Walking performance was assessed using self-selected walking speed and beam-walking proficiency (i.e., distance walked on a narrow beam). Motor module generalization between experts and novices was compared using rank-sum tests and the association between generalization and walking performance was assessed using correlation analyses. Results: Experts generalized more motor modules across standing reactive balance and walking than novices (p = 0.009). Across all subjects, motor module generalization was moderately associated with increased beam walking proficiency (r = 0.456, p = 0.022) but not walking speed (r = 0.092, p = 0.349). Significance: Similar relationships between walking performance and motor module generalization exist in neurologically intact and impaired populations, suggesting that motor module generalization across standing reactive balance and walking may be a general neuromuscular mechanism contributing to the successful control of walking.
引用
收藏
页码:242 / 247
页数:6
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