当前位置： SCI文献检索 > EXPERIMENTAL BRAIN RESEARCH期刊下所有文献 > Impact of Parkinson's disease on proprioceptively based on-line movement control.

Impact of Parkinson's disease on proprioceptively based on-line movement control.

Abstract：

:Evidence suggests that Parkinson's disease (PD) patients produce large spatial errors when reaching to proprioceptively defined targets. Here, we examined whether these movement inaccuracies result mainly from impaired use of proprioceptive inputs for movement planning mechanisms or from on-line movement guidance. Medicated and non-medicated PD patients and healthy controls performed three-dimensional reaching movements in four sensorimotor conditions that increase proprioceptive processing requirements. We assessed the influence of these sensorimotor conditions on the final accuracy and initial kinematics of the movements. If the patterns of final errors are primarily determined by planning processes before the initiation of the movement, the initial kinematics of reaching movements should show similar trends and predict the pattern of final errors. Medicated and non-medicated PD patients showed a greater mean level of final 3D errors than healthy controls when proprioception was the sole source of information guiding the movement, but this difference reached significance only for medicated PD patients. However, the pattern of initial kinematics and final spatial errors were markedly different both between sensorimotor conditions and between groups. Furthermore, medicated and non-medicated PD patients were less efficient than healthy controls in compensating for their initial spatial errors (hand distance from target location at peak velocity) when aiming at proprioceptively defined compared to visually defined targets. Considered together, the results are consistent with a selective deficit in proprioceptively based movement guidance in PD. Furthermore, dopaminergic medication did not improve proprioceptively guided movements in PD patients, indicating that dopaminergic dysfunction within the basal ganglia is not solely responsible for these deficits.

journal_name

Exp Brain Res

journal_title

Experimental brain research

authors

Mongeon D,Blanchet P,Bergeron S,Messier J

doi

10.1007/s00221-015-4343-4

subject

Has Abstract

pub_date

2015-09-01 00:00:00

pages

2707-21

issue

eissn

0014-4819

issn

1432-1106

journal_volume

233

pub_type

杂志文章

在线工具

Impact of Parkinson's disease on proprioceptively based on-line movement control.