Effects of a moving target versus a temporal constraint on reach and grasp in patients with Parkinson's disease

Dopaminergic contributions to distance estimation in Parkinson's disease: A sensory-perceptual deficit?

“…The current study was able to rule out this hypothesis by testing participants in a passive motion condition (i.e., pushed in a wheelchair) as well as in virtual reality where visual motion was simulated without vestibular information. During passive motion (wheelchair condition), both groups did not differ in judgment accuracy demonstrating that when all other sensory cues are available, and proprioception is limited, PD patients are able to estimate distance with motion as accurately as healthy control 30 participants suggesting perhaps that visual motion stimuli engage neural circuits that are less affected by PD (Majsak, Kaminski, Gentile, & Flanagan, 1998;Majsak, Kaminski, Gentile, & Gordon, 2008).…”

Immediate positive effects of physical therapy on gait disturbance in patients with parkinson's disease

“…Balance training has been found to be effective in improving balance in PD patients [22,23], and in this study we used balance training with proprioceptive feedback. In terms of the recreational training component of our session, patients engaged in a ball-catching exercise since it has been demonstrated that PD patients move as fast as healthy subjects when reaching for a moving or stationary ball under temporal constraints [24]. Gait in PD patients is reported to be improved by the use of visual or auditory cues [25], although it is not clear exactly how such cues improve gait.…”

Trunk–arm coordination in reaching for moving targets in people with Parkinson’s disease: Comparison between virtual and physical reality

“…Based on our pilot studies Wang et al, 2011) and previous research (Majsak et al, 1998(Majsak et al, , 2008 on the effect of moving targets on reaching, a power analysis suggested that 47 participants were needed to yield a power of 80% with the significance criterion set at a = .05 (Cohen, 1988). Potential participants with PD were recruited by written invitation and with flyers posted at movement disorder clinics.…”

“…For people with PD, a moving target provides visual motion stimuli that may serve as an external trigger and compensate for the impaired internal timing cueing caused by basal ganglia dysfunction. Some studies examined the effect of fast-moving targets on the kinematics of reach and grasp (Majsak, Kaminski, Gentile, & Flanagan, 1998;Majsak, Kaminski, Gentile, & Gordon, 2008;Schenk, Baur, Steude, & Botzel, 2003). Their results indicated that a moving target improved the speed of reaching movement in participants with PD to a level similar to that in healthy controls (Majsak et al, 1998(Majsak et al, , 2008.…”

“…Some studies examined the effect of fast-moving targets on the kinematics of reach and grasp (Majsak, Kaminski, Gentile, & Flanagan, 1998;Majsak, Kaminski, Gentile, & Gordon, 2008;Schenk, Baur, Steude, & Botzel, 2003). Their results indicated that a moving target improved the speed of reaching movement in participants with PD to a level similar to that in healthy controls (Majsak et al, 1998(Majsak et al, , 2008. Except for the grasping component, the movement speed in participants with PD was only slightly improved by the moving target, and it remained impaired compared with controls (Schenk et al, 2003).…”