Barbieri Fabio Augusto, Carpenter Mark, Beretta Victor Spiandor, Orcioli-Silva Diego, Simieli Lucas, Vitório Rodrigo, Gobbi Lilian Teresa Bucken
São Paulo State University (UNESP) - Campus Bauru, Graduate Program in Movement Science, Human Movement Research Laboratory (MOVI-LAB), Department of Physical Education, Bauru, SP, Brazil.
University of British Columbia, School of Kinesiology, Vancouver, BC, Canada.
Hum Mov Sci. 2019 Feb;63:129-137. doi: 10.1016/j.humov.2018.10.008. Epub 2018 Dec 4.
Postural control asymmetry is an important aspect of Parkinson's disease (PD) that may be associated with falls. The aim of this study was to compare the postural control asymmetry during postural tasks between fallers and non-fallers in people with PD and neurological healthy age-matched controls (CG). Individuals with idiopathic PD (n = 24) and CG (n = 24) were sub-divided into groups of fallers and non-fallers based on their fall history over the past year. Participants performed blocks of three 30-s trials of quiet standing with feet in a side-by-side and semi-tandem stance position. The center of pressure parameters for each limb were measured and used to calculate the symmetry index. Fallers compared to non-fallers had decreased asymmetry of vertical force in the side-by-side condition. During the tandem-front leg condition, PD non-fallers increased asymmetry of the medial-lateral velocity of sway compared to CG non-fallers. In addition, for the tandem-back leg condition, PD non-fallers increased asymmetry of total displacement and medial-lateral root mean square and mean velocity of sway compared to PD fallers. The results of the study did not support the hypothesis that PD fallers are more asymmetric than PD non-fallers. On the contrary, our results indicated that PD non-fallers had higher postural control asymmetry, especially during the more challenging (semi-tandem standing) postural task.
姿势控制不对称是帕金森病（PD）的一个重要方面，可能与跌倒有关。本研究的目的是比较帕金森病患者和年龄匹配的神经健康对照者（CG）中跌倒者和非跌倒者在姿势任务期间的姿势控制不对称情况。根据过去一年的跌倒史，将特发性帕金森病患者（n = 24）和对照者（n = 24）分为跌倒者组和非跌倒者组。参与者以双脚并排和半串联站立姿势进行三组30秒的安静站立试验。测量每个肢体的压力中心参数并用于计算对称指数。与非跌倒者相比，跌倒者在并排站立时垂直力的不对称性降低。在串联前腿站立时，与对照者非跌倒者相比，帕金森病非跌倒者摆动的内侧-外侧速度不对称性增加。此外，在串联后腿站立时，与帕金森病跌倒者相比，帕金森病非跌倒者总位移、内侧-外侧均方根和摆动平均速度的不对称性增加。该研究结果不支持帕金森病跌倒者比非跌倒者更不对称的假设。相反，我们的结果表明，帕金森病非跌倒者具有更高的姿势控制不对称性，尤其是在更具挑战性的（半串联站立）姿势任务期间。
