scholarly journals Delineation of volunatary movement in Parkinson's disease with the manual control system.

1981 ◽  
Vol 134 (1) ◽  
pp. 87-96
Author(s):  
ITARU KIMURA ◽  
GEN SATO ◽  
KATSUYA ITAHARA
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Control System ◽  
Manual Control ◽  
Manual Control System

Prolonged Standing Task Affects Adaptability of Postural Control in People With Parkinson’s Disease

2020 ◽  
Vol 35 (1) ◽  
pp. 58-67
Author(s):  
Gabriel Felipe Moretto ◽  
Felipe Balistieri Santinelli ◽  
Tiago Penedo ◽  
Luis Mochizuki ◽  
Natalia Madalena Rinaldi ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Control System ◽  
Postural Control ◽  
The Body ◽  
Quiet Standing ◽  
Body Sway ◽  
Control Group ◽  
Postural Control System ◽  
Prolonged Standing

Background Studies on short-term upright quiet standing tasks have presented contradictory findings about postural control in people with Parkinson’s disease (pwPD). Prolonged trial durations might better depict body sway and discriminate pwPD and controls. Objective The aim of this study was to investigate postural control in pwPD during a prolonged standing task. Methods A total of 26 pwPD and 25 neurologically healthy individuals performed 3 quiet standing trials (60 s) before completing a constrained prolonged standing task for 15 minutes. Motion capture was used to record body sway (Vicon, 100 Hz). To investigate the body sway behavior during the 15 minutes of standing, the analysis was divided into three 5-minute-long phases: early, middle, and late. The following body sway parameters were calculated for the anterior-posterior (AP) and medial-lateral (ML) directions: velocity, root-mean-square, and detrended fluctuations analysis (DFA). The body sway area was also calculated. Two-way ANOVAs (group and phases) and 1-way ANOVA (group) were used to compare these parameters for the prolonged standing and quiet standing, respectively. Results pwPD presented smaller sway area ( P < .001), less complexity (DFA; AP: P < .009; ML: P < .01), and faster velocity (AP: P < .002; ML: P < .001) of body sway compared with the control group during the prolonged standing task. Although the groups swayed similarly (no difference for sway area) during quiet standing, they presented differences in sway area during the prolonged standing task ( P < .001). Conclusions Prolonged standing task reduced adaptability of the postural control system in pwPD. In addition, the prolonged standing task may better analyze the adaptability of the postural control system in pwPD.

Nonlinear and Time-Varying Dynamical Models of Human Operators in Manual Control Systems

1966 ◽  
Vol 8 (2) ◽  
pp. 97-120 ◽  
Author(s):  
Walter W. Wierwille ◽  
Gilbert A. Gagne
Keyword(s):  
Control System ◽  
Linear Time ◽  
Human Operator ◽  
Manual Control ◽  
Time Variability ◽  
Time Varying ◽  
Deterministic Theory ◽  
Manual Control System ◽  
New Information ◽  
Human Operators

This paper describes the application of a deterministic theory for characterizing or modeling the dynamics of a human operator in a manual control system. Linear time-varying, nonlinear time-varying, and non-linear constant-coefficient models are obtained by applying the theory to tracking data taken for one- and two-axis tasks with various displays. The accuracy and fidelity of these advanced models are explored in detail. Also, new information about time variability and nonlinearity of the human operator, obtained by studying the models and the manual control system signals, is presented.

Predictive Capabilities of Nonhuman Operators in a Manual Control System

1980 ◽  
Vol 51 (3) ◽  
pp. 759-764 ◽  
Author(s):  
Robert J. Jaeger
Keyword(s):  
Control System ◽  
Control Systems ◽  
System Performance ◽  
Rhesus Monkeys ◽  
Input Data ◽  
Manual Control ◽  
Manual Control System ◽  
System Input

The requirement for a credible monkey-man extrapolation in the area of manual control systems led to the investigation of the predictor-operator phenomenon in rhesus monkeys performing in a manual control system. Two monkeys were trained to proficiency in a single-axis visual compensatory manual control system using a random (unpredictable) system input. Data were obtained for system performance in the random case. The system input was then changed to pure sinusoidal (predictable). Data were obtained for the sinusoidal case and compared with data for the random case. Unlike humans, monkeys were not able to improve system performance in the predictable versus unpredictable case.

Degradation of postural control system as a consequence of Parkinson's disease and ageing

2005 ◽  
Vol 376 (3) ◽  
pp. 215-220 ◽  
Author(s):  
Maciej Bosek ◽  
Bronisław Grzegorzewski ◽  
Andrzej Kowalczyk ◽  
Ignacy Lubiński
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Control System ◽  
Postural Control ◽  
Postural Control System
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