Biological Motion Perception in Parkinson's Disease

描述（由申请人提供）：帕金森病（PD）是一种神经退行性疾病，导致视觉感知和运动障碍。迄今为止的研究忽略了确定PD是否会影响对人体运动（生物运动）这一独特而重要的视觉线索的感知。PD患者感知生物运动的能力可能与他们的运动缺陷有关，运动功能和动作感知之间的共同编码系统表明了这一联系，该系统由已知PD中功能失调的额叶、运动和顶叶皮层介导。这种感知-行动联系也表明，使用人体运动的视觉训练可能有效地恢复PD患者的运动缺陷。本研究的目的是研究PD患者的生物运动感知及其与运动的关系（目的1），并确定使用生物运动进行视觉训练是否可以改善PD患者的运动缺陷（目的2）。目的1将测量PD患者对以不同步行速度和运动模式为特征的生物运动感知的敏感性。假设PD患者在感知健康（更快）的步行速度和运动模式方面会受到损害，并且患者的运动缺陷将显著预测其生物运动感知损害的程度。目标2将使用视觉训练范例

DESCRIPTION (provided by applicant): Parkinson's disease (PD) is a neurodegenerative disorder that leads to deficits in both visual perception and locomotion. Research to date has neglected to determine whether PD affects the perception of a unique and important visual cue, that of human body motion (biological motion). PD patients' ability to perceive biological motion may be tied to their locomotion deficits, a link suggested by a common coding system between motor function and action perception that is mediated by frontal, motor, and parietal cortices known to be dysfunctional in PD. This perception-action link also suggests that visual training using human motion may be effective in rehabilitating the locomotion deficits in PD. The goals of the proposed study are to investigate biological motion perception and its relation to locomotion in PD (Aim1), and to determine whether visual training using biological motion can improve locomotion deficits in PD (Aim 2). Aim 1 will measure PD patients' sensitivity to perceiving biological motion characterized by different walking speeds and locomotion patterns. The hypotheses are that PD patients will be impaired at perceiving healthy (faster) walking speeds and locomotion patterns, and that patients' locomotion deficits will significantly predict the extet of their impairment in biological motion perception. Aim 2 will use a visual training paradigm that will help patients to discriminate between abnormal, inefficient locomotion and healthy, efficient locomotion. Patients' locomotion will be measured naturalistically at home using activity monitoring in order to determine whether the visual training leads to functional changes in locomotion in patients' daily lives. Together, these goals will enable researchers and clinicians to better understand how PD affects the visual analysis of other humans and their actions, a perceptual ability that is critical to effective social functioning. It will also allow researchersto elucidate the perception-action link in PD, including the specific relation between real-world locomotion and biological motion perception, and how this is affected by PD-related neural dysfunction. Finally, it will provide data regarding the effectiveness of a novel intervention that may improve patients' disordered locomotion. These data will be critically important in establishing whether visual training can be used as a rehabilitation technique in PD that would improve patients' natural walking ability in daily life.