Effects of visual feedback on manual tracking and action tremor in Parkinson's disease

1999 ◽  
Vol 129 (3) ◽  
pp. 0477-0481 ◽  
Author(s):  
X. Liu ◽  
S. A. Tubbesing ◽  
T. Z. Aziz ◽  
R. C. Miall ◽  
J. F. Stein
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Visual Feedback ◽  
Manual Tracking ◽  
Action Tremor

Pointing to Remembered Targets in 3-D Space in Parkinson's Disease

Motor Control ◽  
1998 ◽  
Vol 2 (3) ◽  
pp. 251-277 ◽  
Author(s):  
Howard Poizner ◽  
Olga I. Fookson ◽  
Michail B. Berkinblit ◽  
Wayne Hening ◽  
Gregory Feldman ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Visual Feedback ◽  
Tracking System ◽  
Three Dimensional ◽  
Performance Deficits ◽  
Normal Speed ◽  
Task Conditions ◽  
Variable Errors ◽  
Target Locations

A three-dimensional tracking system was used to examine whether subjects with Parkinson's disease (PD) would show characteristic performance deficits in an unconstrained pointing task. Five targets were presented in a pyramidal array in space to 11 individuals with mild to moderate PD and 8 age-matched controls. After the target was indicated, subjects closed their eyes and pointed to the remembered target locations without vision. Despite the absence of visual feedback during movement, PD subjects were as accurate overall as controls. However, PD subjects showed greater variable errors, more irregular trajectories, and a vertical endpoint bias in which their endpoints were significantly lower than controls. They also showed deficiencies in the compensatory organization of joint rotations to ensure consistency in azimuthal (horizontal) positioning of the arm endpoint. We concluded that, under appropriate task conditions, PD subjects may not show overall deficits in accuracy even when making targeted movements at normal speed without visual feedback. Nevertheless, our findings indicate that there are certain dimensions of performance which are selectively altered in Parkinson's disease even when overall performance is normal.

Game-Based Augmented Visual Feedback for Enlarging Speech Movements in Parkinson's Disease

2017 ◽  
Vol 60 (6S) ◽  
pp. 1818-1825 ◽  
Author(s):  
Yana Yunusova ◽  
Elaine Kearney ◽  
Madhura Kulkarni ◽  
Brandon Haworth ◽  
Melanie Baljko ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Visual Feedback ◽  
Speech Intelligibility ◽  
Training Session ◽  
Working Space ◽  
Retention Session ◽  
Tongue Movements ◽  
Impaired Speech ◽  
And Training

Purpose The purpose of this pilot study was to demonstrate the effect of augmented visual feedback on acquisition and short-term retention of a relatively simple instruction to increase movement amplitude during speaking tasks in patients with dysarthria due to Parkinson's disease (PD). Method Nine patients diagnosed with PD, hypokinetic dysarthria, and impaired speech intelligibility participated in a training program aimed at increasing the size of their articulatory (tongue) movements during sentences. Two sessions were conducted: a baseline and training session, followed by a retention session 48 hr later. At baseline, sentences were produced at normal, loud, and clear speaking conditions. Game-based visual feedback regarding the size of the articulatory working space (AWS) was presented during training. Results Eight of nine participants benefited from training, increasing their sentence AWS to a greater degree following feedback as compared with the baseline loud and clear conditions. The majority of participants were able to demonstrate the learned skill at the retention session. Conclusions This study demonstrated the feasibility of augmented visual feedback via articulatory kinematics for training movement enlargement in patients with hypokinesia due to PD. Supplemental Materials https://doi.org/10.23641/asha.5116840

Delayed visual feedback and movement control in Parkinson's disease

1990 ◽  
Vol 110 (2) ◽  
pp. 228-235 ◽  
Author(s):  
A. Beuter ◽  
J.G. Milton ◽  
C. Labrie ◽  
L. Glass ◽  
S. Gauthier
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Visual Feedback ◽  
Movement Control ◽  
Delayed Visual Feedback

scholarly journals Rhythmic movement in Parkinson’s disease: effects of visual feedback and medication state

2011 ◽  
Vol 211 (2) ◽  
pp. 277-286 ◽  
Author(s):  
S. Levy-Tzedek ◽  
H. I. Krebs ◽  
J. E. Arle ◽  
J. L. Shils ◽  
H. Poizner
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Visual Feedback ◽  
Rhythmic Movement

Action tremor and weakness in Parkinson's disease: A study of the elbow extensors

1998 ◽  
Vol 13 (1) ◽  
pp. 56-60 ◽  
Author(s):  
Peter Brown ◽  
Daniel M. Corcos ◽  
John C. Rothwell
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Action Tremor
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