Differences in postural sway among healthy adults are associated with the ability to perform steady contractions with leg muscles

2020 ◽  
Vol 238 (2) ◽  
pp. 487-497 ◽  
Author(s):  
Leah A. Davis ◽  
Stephen P. Allen ◽  
Landon D. Hamilton ◽  
Alena M. Grabowski ◽  
Roger M. Enoka
Keyword(s):  
Postural Sway ◽  
Healthy Adults ◽  
Leg Muscles

scholarly journals Inertial Sensor Reliability and Validity for Static and Dynamic Balance in Healthy Adults: A Systematic Review

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5167
Author(s):  
Nicky Baker ◽  
Claire Gough ◽  
Susan J. Gordon
Keyword(s):  
Systematic Review ◽  
Discriminant Validity ◽  
Inertial Sensors ◽  
Postural Sway ◽  
Inertial Sensor ◽  
Dynamic Balance ◽  
Healthy Adults ◽  
Gait Velocity ◽  
Time Data ◽  
Targeted Interventions

Compared to laboratory equipment inertial sensors are inexpensive and portable, permitting the measurement of postural sway and balance to be conducted in any setting. This systematic review investigated the inter-sensor and test-retest reliability, and concurrent and discriminant validity to measure static and dynamic balance in healthy adults. Medline, PubMed, Embase, Scopus, CINAHL, and Web of Science were searched to January 2021. Nineteen studies met the inclusion criteria. Meta-analysis was possible for reliability studies only and it was found that inertial sensors are reliable to measure static standing eyes open. A synthesis of the included studies shows moderate to good reliability for dynamic balance. Concurrent validity is moderate for both static and dynamic balance. Sensors discriminate old from young adults by amplitude of mediolateral sway, gait velocity, step length, and turn speed. Fallers are discriminated from non-fallers by sensor measures during walking, stepping, and sit to stand. The accuracy of discrimination is unable to be determined conclusively. Using inertial sensors to measure postural sway in healthy adults provides real-time data collected in the natural environment and enables discrimination between fallers and non-fallers. The ability of inertial sensors to identify differences in postural sway components related to altered performance in clinical tests can inform targeted interventions for the prevention of falls and near falls.

scholarly journals 8B45 A Statistical Classification of Upright Postural Sway in Healthy Adults and Patients with Parkinson's Disease

2012 ◽  
Vol 2012.24 (0) ◽  
pp. _8B45-1_-_8B45-2_
Author(s):  
Tomohisa YAMAMOTO ◽  
Charles E. SMITH ◽  
Yasuyuki SUZUKI ◽  
Takao TANAHASHI ◽  
Takayuki ENDO ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Postural Sway ◽  
Healthy Adults ◽  
Statistical Classification

scholarly journals Visual Fixations and Motion Sensitivity: Protocol for an Exploratory Study (Preprint)

2019 ◽  
Author(s):  
Shikha Chaudhary ◽  
Nicola Saywell ◽  
Arun Kumar ◽  
Denise Taylor
Keyword(s):  
New Zealand ◽  
Postural Sway ◽  
Force Plate ◽  
Ethics Committees ◽  
Healthy Adults ◽  
Eye Tracker ◽  
Shopping Malls ◽  
Motion Sensitivity ◽  
Clinical Trials Registry ◽  
Visual Fixations

BACKGROUND Motion sensitivity after vestibular disorders is associated with symptoms of nausea, dizziness, and imbalance in busy environments. Dizziness and imbalance are reported in places such as supermarkets and shopping malls which have unstable visual backgrounds; however, the mechanism of motion sensitivity is poorly understood. OBJECTIVE The main aim of this exploratory observational study is to investigate visual fixations and postural sway in response to increasingly complex visual environments in healthy adults and adults with motion sensitivity. METHODS A total of 20 healthy adults and 20 adults with motion sensitivity will be recruited for this study. Visual fixations, postural sway, and body kinematics will be measured with a mobile eye tracker device, force plate, and 3D motion capture system, respectively. Participants will be exposed to experimental tasks requiring visual fixation on letters, projected on a range of backgrounds on a large screen during quiet stance. Descriptive statistics (mean and standard deviation) will be calculated for each of the variables. One-way independent-measures analyses of variance will be performed to investigate the differences between groups for all variables. RESULTS Data collection was started in May 2019 and was completed by February 2020. It was approved by Health and Disability Ethics Committees, Ministry of Health, New Zealand on November 2, 2018 (Ethics ref: 18/CEN/193). We are currently processing the data and will begin data analysis in July 2020. We expect the results to be available for publication by the end of 2020. The trial was funded by the Neurology Special Interest Group, Physiotherapy New Zealand, and the Eisdell Moore Centre in November 2018. CONCLUSIONS This study will provide a detailed investigation of visual fixations in response to increasingly complex visual environments. Investigating characteristics of visual fixations in healthy adults and those with motion sensitivity will provide insight into this disabling condition and may inform the development of new intervention strategies which explicitly cater to the needs of this population. CLINICALTRIAL Australian New Zealand Clinical Trials Registry, ACTRN12619000254190; https://tinyurl.com/yxbn7nks INTERNATIONAL REGISTERED REPORT PRR1-10.2196/16805

scholarly journals Effects of Changes of Foot Position on Romberg's Quotient of Postural Sway and Leg Muscles Electromyographic Activities in Standing.

2000 ◽  
Vol 3 (1) ◽  
pp. 17-20 ◽  
Author(s):  
Shu Morioka ◽  
Manabu Okita ◽  
Yu Takata ◽  
Shozo Miyamoto ◽  
Hideyuki Itaba
Keyword(s):  
Postural Sway ◽  
Leg Muscles ◽  
Foot Position

Low-Alcohol Doses Reduce Common 10- to 15-Hz Input to Bilateral Leg Muscles During Quiet Standing

2008 ◽  
Vol 100 (4) ◽  
pp. 2158-2164 ◽  
Author(s):  
T. W. Boonstra ◽  
M. Roerdink ◽  
A. Daffertshofer ◽  
B. van Vugt ◽  
G. van Werven ◽  
...  
Keyword(s):  
Postural Sway ◽  
Muscular Activity ◽  
Alcohol Ingestion ◽  
Quiet Standing ◽  
Common Input ◽  
Leg Muscles ◽  
Extensor Muscles ◽  
Flexor Muscles ◽  
Eyes Open ◽  
Distinct Frequency

The effects of low doses of alcohol on neural synchronization in muscular activity were investigated in ten participants during quiet standing with eyes open or closed. We focused on changes in common input to bilateral motor unit pools as evident in surface electromyographic (EMG) recordings of lower leg extensor and flexor muscles. The extensor muscles exhibited bilateral synchronization in two distinct frequency bands (i.e., 0–5 and 10–15 Hz), whereas synchronization between flexor muscles was minimal. As expected, alcohol ingestion affected postural sway, yielding increased sway at higher blood-alcohol levels. Whereas vision affected bilateral synchronization only at 0–5 Hz, alcohol ingestion resulted in a progressive decrease of synchronization at 10–15 Hz between the EMG activities of the extensor muscles. The decrease in common bilateral input is most likely related to reduced reticulospinal activity with alcohol ingestion.

Sign in / Sign up

Export Citation Format

Share Document