Analysis of the Body Sway While/After Viewing Visual Target Movement Synchronized with Background Motion

2018 ◽  
pp. 3-14
Author(s):  
Nao Amano ◽  
Hiroki Takada ◽  
Yusuke Jono ◽  
Toru Tanimura ◽  
Fumiya Kinoshita ◽  
...  
Keyword(s):  
Visual Target ◽  
The Body ◽  
Body Sway ◽  
Target Movement ◽  
Background Motion

Evaluation of Body Sway Using Tactile Stimuli on the Body Trunk

2016 ◽  
Vol 136 (8) ◽  
pp. 1135-1141
Author(s):  
Ryo Hasegawa ◽  
Amir Maleki ◽  
Masafumi Uchida
Keyword(s):  
The Body ◽  
Body Sway ◽  
Tactile Stimuli

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.

scholarly journals Frequency analysis of the body sway

Sangyo Igaku ◽  
1968 ◽  
Vol 10 (4) ◽  
pp. 244
Author(s):  
N. Onishi
Keyword(s):  
Frequency Analysis ◽  
The Body ◽  
Body Sway

Impairments of Postural Balance in Surgically Treated Lumbar Disc Herniation Patients

2020 ◽  
Vol 36 (4) ◽  
pp. 228-234
Author(s):  
Ziva M. Rosker ◽  
Jernej Rosker ◽  
Nejc Sarabon
Keyword(s):  
Postural Balance ◽  
Center Of Pressure ◽  
Balance Control ◽  
The Body ◽  
Surface Velocity ◽  
Body Sway ◽  
Support Surface ◽  
Balance Task ◽  
Lateral Body ◽  
Unstable Support

Reports on body sway control following microdiscectomy lack reports on side-specific balance deficits as well as the effects of trunk balance control deficits on body sway during upright stances. About 3 weeks post microdiscectomy, the body sway of 27 patients and 25 controls was measured while standing in an upright quiet stance with feet positioned parallel on an unstable support surface, a tandem stance with the involved leg positioned in front or at the back, a single-leg stance with both legs, and sitting on an unstable surface. Velocity, average amplitude, and frequency-direction–specific parameters were analyzed from the center of pressure movement, measured by the force plate. Statistically significant differences between the 2 groups were observed for the medial–lateral body sway frequency in parallel stance on a stable and unstable support surface and for the sitting balance task in medial-lateral body sway parameters. Medium to high correlations were observed between body sway during sitting and the parallel stance, as well as between the tandem and single-legged stances. Following microdiscectomy, deficits in postural balance were side specific, as expected by the nature of the pathology. In addition, the results of this study confirmed the connection between proximal balance control deficits and balance during upright quiet balance tasks.

Effects of periodic saccades on the body sway in human subjects

1979 ◽  
Vol 13 (3) ◽  
pp. 253-258 ◽  
Author(s):  
T. Uchida ◽  
M. Hashimoto ◽  
N. Suzuki ◽  
T. Takegami ◽  
Y. Iwase
Keyword(s):  
Human Subjects ◽  
The Body ◽  
Body Sway

scholarly journals Quantitative analysis of the body sway while standing

1977 ◽  
Vol 70 (10special1) ◽  
pp. 1191-1280 ◽  
Author(s):  
Toyohiko Matsuoka
Keyword(s):  
Quantitative Analysis ◽  
The Body ◽  
Body Sway

scholarly journals Peculiarities of Investigated Characteristics of Lithuanian Pistol and Rifle Shooters’ Training and Sport Performance

2018 ◽  
Vol 2 (73) ◽  
Author(s):  
Vaida Gulbinskienė ◽  
Antanas Skarbalius
Keyword(s):  
Training Programme ◽  
Sport Performance ◽  
The Body ◽  
Body Sway ◽  
Sports Performance ◽  
Static Posturography ◽  
Mental Fitness ◽  
The Difference ◽  
Posture Stability ◽  
And Training

The purpose was to identify the peculiarities of selected training and sport performance characteristics: 1. Training strategies, 2. the body sway and 3. mental fitness. Methods: we analysed the sport performance and training characteristics and applied interviews with elite and Lithuanian shooters. The body sway was studied applying the method of static posturography. The subjects were standing in four postures. Mental fitness of the shooters was evaluated 30 min before the start using CSAI–2 methodology and adapted SCAT methodology. The shooters were divided into two groups according to their sports performance: the high and the moderate mastery groups. Statistical analyses was made applying the SPSS 11.0 statistical package. Results: 1. The Lithuanian women pistol shooters’ mean age of the first three place winners corresponded to that of the elite athletes, however the sports results (p < 0.001) were significantly lower. We indicated the following reasons: they trained less than the elite shooters, their specific training was inappropriate (p < 0.001), their mental fitness and competition experience were inappropriate (p < 0.001). 2. The trajectory of the COP in a specific posture (legs at shoulder length, arms down; posture without the pistol; posture with the pistol) was significantly (p < 0.05) different (Fig. 1, Masalskytė et al., 2002) between high and moderate mastery shooters but not in general posture (folded legs and arms down). The results suggested developing shooters’ posture from the very beginning of training. 3. The Lithuanian shooters’ level of anxiety before the starts showed the importance of the duration of exercise and competition experience because the difference between their indices and those of elite shooters was significantly less (p < 0.001). Conclusions: On the basis of sport performance as a multidimensional construct which requires to select the main factors of athlete trainability we conclude that Lithuanian pistol and rifle shooters need a training programme that improves posture stability; they should increase their international competitive experience and have to monitor sport fitness in order to manage psychological stress, and model a further training programme. Social conditions might be the main problem of the Lithuanian shooters to terminate their sport career too early.Keywords: pistol, rifle, shooters’ training, sport performance.

scholarly journals FFT Analysis of the Interaction between the Effect of Visual and Proprioceptive Input on the Body Sway.

1991 ◽  
Vol 50 (4) ◽  
pp. 410-418
Author(s):  
Hajime Nakagawa ◽  
Naoki Ohashi ◽  
Yukio Watanabe
Keyword(s):  
The Body ◽  
Body Sway ◽  
Proprioceptive Input ◽  
Fft Analysis

scholarly journals Investigation of the chaotic dynamics of the vertical strance of a human body on the model of an inverted pendulum

2020 ◽  
Keyword(s):  
Body Mass ◽  
Human Body ◽  
Inverted Pendulum ◽  
Time Derivative ◽  
Clinical Diagnostics ◽  
The Body ◽  
Body Sway ◽  
Vertical Position ◽  
Control Functions ◽  
The Right

Different stances of human body are studied in medicine and biology for quantitative estimation and clinical diagnostics of impairments and diseases of the musculoskeletal, nervous, vestibular systems and functions. Human body is composed of ~200 bones and ~600 muscles, and its upright position is unstable due to high complexity of the system and its control mechanisms. Among different techniques of the body sway recording the stabilography is one of the most simple and cheap unit. It is composed by a force platform that can measure the reaction forces over the contact areas between two feet and the platform. The former is portable and can be connected to any laptop via USB port. In this study the functions controlling the vertical stance of a person are studied accounting for the nonlinear dynamics of oscillations of the projection (XC,YC) of center of mass (CM) of the body on the horizontal plane. The time series {XC(t),YC(t)} have been measured on 28 healthy volunteers (age 21-42, height 156-182 cm, body mass 48-84.8 kg). The volunteers were asked to keep a quiet stance on two feet, similar stances with body mass shifted onto the left and then onto the right leg. Each stance has been repeated during 30 s with open and then with closed eyes. After a short break a test with balancing on the left and then on the right leg has been perfrmed. For each case, based on the mathematical model of the inverted pendulum, the calculated control functions u(t) in the form u(t)=k1(r(t)-r0)+ k2(r/(t)-r/0), where r(t) is the radius-vector of the CM, r0 is its averaged value over time, (.)/ means the time derivative. Using statistical analysis, the absence of correlations between the control functions for both different subjects and for different positions of the body of the same volunteer was shown. Based on the calculations of the Lyapunov exponent, the individuals have been classified into groups with stable, weakly and highly unstable control of the vertical position of the body. The modeling of such systems in the framework of nondeterministic chaos models with nonlinear control is discussed.

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