scholarly journals Time-of-day influence on the stability Evaluation Test in college-age women

Neurology ◽  
2018 ◽  
Vol 91 (23 Supplement 1) ◽  
pp. S16.2-S16
Author(s):  
Brandon Doan ◽  
Jeff Pasley ◽  
Tiffany Rodriguez ◽  
Katherine Valencia ◽  
Tim Tolbert
Keyword(s):  
Postural Control ◽  
Postural Sway ◽  
Statistical Significance ◽  
Time Of Day ◽  
Return To Play ◽  
Order Effects ◽  
Stability Evaluation ◽  
Post Injury ◽  
Evaluation Test ◽  
The Stability

Postural control is impaired following a concussion and is 1 diagnostic method used by medical professionals for return-to-play decisions in potentially concussed athletes. Circadian rhythm (time-of-day) affects human function, including postural control. This research investigated time-of-day influence on 1 postural control diagnostic protocol, the Stability Evaluation Test (SET) on a Neurocom Balance Master. The Georgia Gwinnett College Institutional Review Board approved this research protocol. The research participants were 9 healthy women with an average age of 20.4 years, height of 165.8 cm, and weight of 65.3 kg. The participants completed the SET in the morning (between 7:00 am and 10:00 am) for 1 treatment and in the evening (between 3:00 pm and 7:00 pm) for the other treatment. A SET familiarization session was completed, and treatment order was randomized and balanced to attempt to account for order effects. Average postural sway velocity for each of the 6 SET conditions were compared between times of day. There was less postural sway during the morning testing for all conditions, reaching statistical significance (p < 0.05) for 2 of the more challenging balance conditions (Foam Double Leg and Foam Tandem) as well as for the overall SET composite score. While greater sample size, age and gender range are needed, these results may begin to inform practitioners as to the importance of controlling time-of-day between baseline and post-injury testing which may enable more accurate and reliable return-to-play decisions.

Test-Retest Reliability and Practice Effects of the Stability Evaluation Test

2017 ◽  
Vol 26 (3) ◽  
Author(s):  
Richelle M. Williams ◽  
Matthew A. Corvo ◽  
Kenneth C. Lam ◽  
Travis A. Williams ◽  
Lesley K. Gilmer ◽  
...  
Keyword(s):  
Postural Control ◽  
Repeated Measures ◽  
Healthy Adults ◽  
Composite Score ◽  
Practice Effects ◽  
Stability Evaluation ◽  
Retest Reliability ◽  
Evaluation Test ◽  
The Stability ◽  
Test Retest Reliability

Context: Postural control plays an essential role in concussion evaluation. The Stability Evaluation Test (SET) aims to objectively analyze postural control by measuring sway velocity on the NeuroCom VSR portable force platform (Natus, San Carlos, CA). Objective: To assess the test-retest reliability and practice effects of the SET protocol. Design: Cohort. Setting: Research laboratory. Patients or Other Participants: 50 healthy adults (20 men, 30 women, age 25.30 ± 3.60 y, height 166.60± 12.80 cm, mass 68.80 ± 13.90 kg). Interventions: All participants completed 4 trials of the SET. Each trial consisted of six 20-s balance tests with eyes closed, under the following conditions: double-leg firm (DFi), single-leg firm (SFi), tandem firm (TFi), double-leg foam (DFo), single-leg foam (SFo), and tandem foam (TFo). Each trial was separated by a 5-min seated rest period. Main Outcome Measures: The dependent variable was sway velocity (deg/s), with lower values indicating better balance. Sway velocity was recorded for each of the 6 conditions as well as a composite score for each trial. Test-retest reliability was analyzed across 4 trials with intraclass correlation coefficients (ICCs). Practice effects analyzed with repeated measures analysis of variance, followed by Tukey post hoc comparisons for any significant main effects (P < .05). Results: Sway-velocity reliability values were good to excellent: DFi (ICC = .88; 95%CI: .81, .92), SFi (ICC = .75; 95%CI: .61, .85), TFi (ICC = .84; 95%CI: .75, .90), DFo (ICC = .83; 95%CI: .74, .90), SFo (ICC = .82; 95%CI: .72, .89), TFo (ICC = .81; 95%CI: .69, .88), and composite score (ICC = .93; 95%CI: .88, .95). Significant practice effects (P < .05) were noted on the SFi, DFo, SFo, TFo conditions and composite scores. Conclusions: Our results suggest the SET has good to excellent reliability for the assessment of postural control in healthy adults. Due to the practice effects noted, a familiarization session is recommended (ie, all 6 conditions) before data are recorded. Future studies should evaluate injured patients to determine meaningful change scores during various injuries.

A Cross-Sectional Study of Age Differences and Postural Control in Male Athletes Using the Stability Evaluation Test (SET)

2017 ◽  
Vol 22 (5) ◽  
pp. 39-43 ◽  
Author(s):  
Richelle M. Williams ◽  
Trevor Rice ◽  
Kenneth Lam ◽  
Tamara Valovich McLeod
Keyword(s):  
Postural Control ◽  
Sport Participation ◽  
Age Groups ◽  
Stability Evaluation ◽  
Test Protocol ◽  
Cross Sectional ◽  
Age Related ◽  
Evaluation Test ◽  
The Stability ◽  
Older Males

Postural control is an integral part of sport participation and is often measured when assessing concussion and rehabilitating musculoskeletal injuries. The purpose of this study was to determine whether developmental differences in postural control, as measured by the Stability Evaluation Test protocol, exist between multiple male age groups (9–25-years-old). Significant differences were present across age groups, suggesting pediatric males demonstrated higher sway velocity scores than older males. We also found that preadolescent males showed increased postural sway when compared with older populations. Overall, it was found that age-related differences exist in postural control, with older males demonstrating less sway, and therefore better postural control.

scholarly journals Time-of-day Influence On The Stability Evaluation Test (set)

2019 ◽  
Vol 51 (Supplement) ◽  
pp. 355-356
Author(s):  
Jeff Pasley ◽  
Sara Camp ◽  
Kade Carrigan ◽  
Brandon Doan
Keyword(s):  
Time Of Day ◽  
Stability Evaluation ◽  
Test Set ◽  
Evaluation Test ◽  
The Stability

scholarly journals Analysis of Postural Stability After Concussion Using Empirical Mode Decomposition: A Pilot Study

2017 ◽  
Author(s):  
Charles M. Schneider ◽  
Ajay K. Verma ◽  
Tamanna T. K. Munia ◽  
Mark Romanick ◽  
Kouhyar Tavakolian ◽  
...  
Keyword(s):  
Postural Control ◽  
Empirical Mode Decomposition ◽  
Postural Stability ◽  
Center Of Pressure ◽  
Return To Play ◽  
Electrode Placement ◽  
Upright Stance ◽  
Post Injury ◽  
Mode Decomposition ◽  
Postural Equilibrium

Maintaining upright stance is a complex process, it requires appropriate functioning of a postural control system which consists of inputs from somatosensory, vestibular, musculoskeletal, and proprioceptive systems as well as from several brain regions [1–4]. A concussion is defined as a brain injury caused due to unexpected acceleration/deceleration of the head causing temporary alteration of brain function and it is a prevalent source of injury to football athletes [1]. With the altered function of the brain, the ability to maintain postural equilibrium becomes challenging due to the inability of individuals to respond promptly to stressors, thus, making maintenance of postural equilibrium rather difficult for individuals with a concussion. Effects of concussion on postural ability are shown to last up to three days post injury [5]. Postural stability test, therefore, can be performed to make a valid return to play (RTP) decision, pre-mature RTP is shown to have been catastrophic due to its potential to permanently impair previously affected region/functioning [1,5]. Postural sway data (center of pressure, COP) is traditionally analyzed to study the postural control. Therefore, COP can provide critical information regarding individual’s ability to maintain upright stance post injury. A more sensitive concussion assessment tool based on electroencephalogram (EEG) is used to accurately track effects of concussion [6]. However, sophisticated electrode placement requirement inhibits its immediate applicability. In current preliminary research, we attempt to differentiate athletes with a history of concussion (experimental) from healthy (control) using postural data. In order to do so, a concept of empirical mode decomposition (EMD) was adopted. EMD has shown evidence in the literature to infer vital information pertaining to the complex underlying physiological phenomenon [4, 7–8]. In the current research, the resultant COP (COPr) was decomposed into its finite set of band-limited signals termed as intrinsic mode functions (IMFs) [8], a set of linear and nonlinear features were extracted from COPr and its IMfs. Lastly, a test of significance was conducted to infer the potential of postural data for differentiating concussed from healthy athletes.

Shale Stability Evaluation and Leakage Control of High Density Clay Free Brine Drilling Fluid

2020 ◽  
Vol 861 ◽  
pp. 395-400
Author(s):  
Cong Bing Chang ◽  
Yi Hang Zhang ◽  
Xu Hui Song
Keyword(s):  
Deep Water ◽  
Salt Water ◽  
Drilling Fluid ◽  
High Density ◽  
Stability Evaluation ◽  
Evaluation Test ◽  
The Stability ◽  
Fluid Design ◽  
Effect Test ◽  
Selection Of

In view of the particularity of deep-water thick rock reservoir, in order to deal with the problem of poor reservoir stability and serious loss of drilling fluid in the drilling fluid design of M oilfield, this paper has carried out the reservoir inhibitor optimization evaluation test for the salt resistant high-density drilling fluid which has been designed and optimized, and also carried out the appropriate selection of plugging materials and plugging effect test for the loss of salt gypsum layer. The results show that the stability of saturated salt water drilling fluid in the salt gypsum layer with shale can be effectively ensured by the combination of CPI and uhib inhibitors within 2%. At the same time, FloSeal, a new plugging agent for 1-2mm fractures, is selected, and its plugging loss capacity is stably controlled below 30ml.

Recovery Trajectory of Postural Control Impairments Following a Concussion: A Case Study

2020 ◽  
Vol 29 (3) ◽  
pp. 346-351
Author(s):  
Adam C. King
Keyword(s):  
Postural Control ◽  
Postural Sway ◽  
Center Of Pressure ◽  
Recovery Phase ◽  
Multiscale Entropy ◽  
Single Subject ◽  
Healthy Controls ◽  
Post Injury ◽  
Recovery Trajectory

Context: Altered postural control represents one of the most common motor consequences following a concussion and there is a paucity of data monitoring the recovery trajectory that identifies the persistent changes of postural control. Objective: To determine whether the recovery trajectory of postural control was consistent across different measures of postural stability and whether increased postural challenge (ie, sloped surface) revealed subtle postural impairments. Design: A single-subject case study. Setting: Research laboratory. Patients or Other Participants: One concussed individual with a cohort of healthy controls (n = 10) used for comparison. Main Outcome Measures: Center of pressure variability (linear—SD and nonlinear—multiscale entropy) was used to index postural sway preinjury and at periodic intervals following the concussion. Results: The concussed individuals displayed reduced amounts of sway during the initial recovery phase that failed to returned to preinjury levels but reached the level of healthy controls at 1-month postinjury. The multiscale entropy analysis revealed increased center of pressure irregularity throughout recovery that persisted up to 1-month post injury. Conclusions: The findings identified subtle, persistent postural control impairments revealed through the nonlinear analysis of center of pressure and supports the notion that the consequences of a concussion (ie, impaired postural control) need to be considered beyond the resolution of behavioral symptoms.

An impact of intima media thickness of carotids in cardio vascular profile

2020 ◽  
Vol 10 (2) ◽  
pp. 48-52
Author(s):  
Jeevitha M ◽  
Kalaichandar M ◽  
Kirubakaran K ◽  
Baskaran V ◽  
Kokila K ◽  
...  
Keyword(s):  
Blood Pressure ◽  
High Blood Pressure ◽  
Statistical Significance ◽  
Intima Media Thickness ◽  
Cardio Vascular ◽  
Intima Medial Thickness ◽  
The Stability ◽  
Carotid Intima Medial Thickness ◽  
Oral Sodium ◽  
Worse Prognosis

Low blood pressure truly includes a worse prognosis than the excessive blood strain. This mechanism,bills for the "reverse causation "seen within the haemodialysis’ patients, the company of conventional risk elements, such as high blood pressure, hyperlipidemia, and obesity, appear to be a worst diagnosis.Exogenous erythropoietic products can growth blood strain and requirement of antihypertensive tablets.30 Chronic ECFV overload secondary to activation of renin-angiotensin-aldosterone axisand disturbances inside the stability of vasoconstrictors and the vasodilators make a contribution to high blood pressure. Improvement in blood pressure can be introduced out with oral sodium restriction, diuretics, and fluid elimination with dialysis. Some patients will continue to be hypertensive notwithstanding of the careful attention to ECFV reputation. LVH is related with reduced endurance of sufferers on hemo/peritoneal dialysis .Lower five year survival charge in ESRD patients with LVH have a 30% than people missing LVH. This have a look at produces the mean carotid artery intima-medial thickness turned into higher in sufferers with superior CKD although it did now not attain statistical significance, probable due to smaller sample size.It was also observed that carotid intima medial thickness had no correlation with dyslipidemia. Even though the patients had maintained significantly normal cholesterol and high HDL levels, there was an increase in CIMT. Therefore, CKD patients, CIMT cannot be predicted based on the traditional atherosclerotic risk factors like serum cholesterol and HDL.

Time-of-day effects on the postural control and symptoms in women with rheumatoid arthritis

2021 ◽  
pp. 1-9
Author(s):  
Fatma Bouchaala ◽  
Rabeb Laatar ◽  
Mariam Lahiani ◽  
Nicolas Vuillerme ◽  
Amira Zouabi ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Postural Control ◽  
Time Of Day
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