Brown Lesley A, de Bruin Natalie, Doan Jon B, Suchowersky Oksana, Hu Bin
Department of Kinesiology, University of Lethbridge, Lethbridge, Alberta, Canada.
Arch Phys Med Rehabil. 2009 Sep;90(9):1578-83. doi: 10.1016/j.apmr.2009.03.009.
To investigate the effect of concurrent music on parkinsonian gait in single- and dual-task contexts.
A counterbalanced repeated-measure design.
A university balance research laboratory.
People with idiopathic Parkinson's disease (PD) (n=10) (67+/-7 y) and healthy age-matched (65+/-6 y) control subjects (n=10).
Subjects walked at a self-selected pace along an unobstructed walkway in 4 differing test conditions. Test conditions were differentiated by the presence of music accompaniment (no music/music) and the presence of a secondary cognitive task (single/dual). Single- and dual-task conditions were randomized; trials were blocked by the presence of music and counterbalanced between subjects. Music was self-selected by subjects. The cognitive task consisted of serial subtractions (3's). Subjects were not instructed to attend to the music nor were they provided with instructions regarding task prioritization.
Mean gait velocity, stride length, and the percentage of the gait cycle spent in double-limb support.
Gait among the PD patients was adversely affected by concurrent music. In contrast, gait performance in the control subjects showed no significant difference between no music and music conditions. The added requirement of a cognitive task differentially influenced gait performance in PD patients and control subjects, with PD patients displaying a further decrease in spatiotemporal parameters of gait and control subjects displaying a marginal improvement.
Gait impairments associated with PD are exacerbated in the presence of concurrent music, an effect that is further exaggerated by the addition of a cognitive task. These results have implications for patient safety in multitasking situations.
研究同步音乐在单任务和双任务情境下对帕金森步态的影响。
平衡重复测量设计。
大学平衡研究实验室。
特发性帕金森病（PD）患者（n = 10）（67±7岁）和年龄匹配的健康对照者（n = 10）（65±6岁）。
受试者在4种不同测试条件下以自选速度沿无障碍通道行走。测试条件根据是否有音乐伴奏（无音乐/有音乐）和是否有次要认知任务（单任务/双任务）来区分。单任务和双任务条件随机安排；试验按是否有音乐进行分组，并在受试者之间进行平衡。音乐由受试者自行选择。认知任务包括连续减法运算（减3）。未指导受试者关注音乐，也未就任务优先级提供指导。
平均步态速度、步长以及双支撑期在步态周期中所占的百分比。
同步音乐会对PD患者的步态产生不利影响。相比之下，对照组在无音乐和有音乐条件下的步态表现无显著差异。认知任务的额外要求对PD患者和对照组的步态表现有不同影响，PD患者的步态时空参数进一步降低，而对照组则略有改善。
在有同步音乐的情况下，与PD相关的步态障碍会加剧，增加认知任务会使这种影响进一步放大。这些结果对多任务情况下的患者安全具有启示意义。
