Department of Applied Physical Therapy, Institute of Health Sciences, Federal University of Triângulo Mineiro, Uberaba, Brazil.
Physical Therapy, Federal University of Triângulo Mineiro, Uberaba, Brazil.
Percept Mot Skills. 2020 Feb;127(1):98-112. doi: 10.1177/0031512519880421. Epub 2019 Oct 8.
Difficulties in the integration of visual, vestibular, and somatosensory information in individuals with Parkinson's disease (PD) may alter perception of verticality. Accordingly, in this cross-sectional study, we analyzed PD patients' ( = 13) subjective visual vertical (SVV) and subjective haptic vertical (SHV) perceptions and compared them to those of healthy controls ( = 14). We compared SVV and SHV findings among participants with PD, healthy controls, and cutoff points of normality based on prior research literature, using the parametric nonpaired test (at < .05) and Cohen's (at 0.8) to determine clinical relevance. We analyzed SVV with the bucket test and SHV with the rod rotations task in clockwise and counterclockwise directions. We calculated Pearson correlations to analyze the association between verticality tests and the most clinically affected body side. We calculated both the percentage of A-effect (expression of body tilt underestimation to the midline) and E-effect (expression of body tilt overestimation in the upright position). Individuals with PD showed greater variability in right SHV supination compared to the healthy control participants ( = .002). There was greater clinical relevance in right (as opposed to left) SVV ( = 0.83), right (as opposed to left) SHV pronation ( = 0.91), and left (as opposed to right) SHV pronation ( = 0.88). We observed a higher proportion of E-effect in individuals with PD. A significantly higher proportion of patients with PD, compared to patients in past literature, had right SHV pronation ( = .001), left SHV pronation ( = .023), right SHV supination ( = .001), left SHV supination ( = .046), and left SHV pronation ( = .046). Thus, subjective visual and proprioceptive perception of verticality is altered in patients with PD, compared to individuals without PD.
患有帕金森病 (PD) 的个体在整合视觉、前庭和本体感觉信息方面可能存在困难，这可能会改变他们对垂直性的感知。因此，在这项横断面研究中，我们分析了 PD 患者（n=13）的主观视觉垂直（SVV）和主观触觉垂直（SHV）感知，并将其与健康对照组（n=14）进行了比较。我们比较了 PD 患者、健康对照组以及基于先前研究文献的正常范围截定点的 SVV 和 SHV 结果，使用参数非配对 t 检验（p<0.05）和 Cohen's （0.8）来确定临床相关性。我们使用桶测试分析 SVV，使用顺时针和逆时针方向的棒旋转任务分析 SHV。我们计算 Pearson 相关性来分析垂直性测试与最受影响的身体侧之间的关系。我们计算了 A 效应（身体倾斜向中线低估的表达）和 E 效应（直立位置身体倾斜高估的表达）的百分比。与健康对照组参与者相比，PD 患者的右侧 SHV 旋前的变异性更大（p=0.002）。右侧（而非左侧）SVV（p=0.83）、右侧（而非左侧）SHV 旋前（p=0.91）和左侧（而非右侧）SHV 旋前（p=0.88）的临床相关性更大。我们观察到 PD 患者的 E 效应比例更高。与过去文献中的患者相比，PD 患者的右 SHV 旋前（p=0.001）、左 SHV 旋前（p=0.023）、右 SHV 旋后（p=0.001）、左 SHV 旋后（p=0.046）和左 SHV 旋前（p=0.046）的比例明显更高。因此，与没有 PD 的个体相比，PD 患者的主观视觉和本体感觉垂直感知发生了改变。
