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Dynamic postural stability

Aviroop Dutt-Mazumder, Seymon M Slobounov, John Henry Challis, Karl Maxim Newell
This investigation examined the effects of slope of the surface of support (35°, 30°, 20°, 10° Facing(Toe) Down, 0° Flat and 10°, 20°, 25° Facing (Toe) Up) and postural orientation on the margins of postural stability in quiet standing of young adults. The findings showed that the center of pressure-CoP (displacement, area and length) had least motion at the baseline (0° Flat) platform condition that progressively increased as a function of platform angle in both facing up and down directions. The virtual time to collision (VTC) dynamics revealed that the spatio-temporal margins to the functional stability boundary were progressively smaller and the VTC time series also more regular (SampEn-Sample Entropy) as slope angle increased...
2016: PloS One
Timothy C Sell, Jonathan J Pederson, John P Abt, Takashi Nagai, Jennifer Deluzio, Michael D Wirt, Larry J McCord, Scott M Lephart
No abstract text is available yet for this article.
October 2016: Military Medicine
A Rosen, J Ko, C Brown
Chronic ankle instability is a common pathological consequence of ankle sprains. However, screening tools which assess self-reported dysfunction offer little insight into clinical factors which may be useful to improve deficits. The purpose of this study was to identify factors that contribute most to self-reported dysfunction. 93 individuals completed the Cumberland Ankle Instability Tool (CAIT), active range of motion, dynamic postural stability assessments, and an arthrometer inversion stress test to assess lateral ankle laxity and stiffness...
October 5, 2016: International Journal of Sports Medicine
Gareth D Jones, Darren C James, Michael Thacker, David A Green
Individuals with sensorimotor pathology e.g., stroke have difficulty executing the common task of rising from sitting and initiating gait (sit-to-walk: STW). Thus, in clinical rehabilitation separation of sit-to-stand and gait initiation - termed sit-to-stand-and-walk (STSW) - is usual. However, a standardized STSW protocol with a clearly defined analytical approach suitable for pathological assessment has yet to be defined. Hence, a goal-orientated protocol is defined that is suitable for healthy and compromised individuals by requiring the rising phase to be initiated from 120% knee height with a wide base of support independent of lead limb...
2016: Journal of Visualized Experiments: JoVE
Salma Jeribi, Abdelmoneem Yahia, Imen Achour, Bouthaina Hammemi, Abdelmoneem Ghorbel, Mohamed Habib Elleuch, Sameh Ghroubi
OBJECTIVE: To determine the effect of completing a vestibular rehabilitation treatment protocol on postural balance, dizziness and quality of life in patients with peripheral vertigo. MATERIAL/PATIENTS AND METHODS: A prospective study concerning patients with instability due to unilateral peripheral vestibular disorder. The patients were evaluated with a clinical examination and a test of static and dynamic balance on the Satel(®) platform in which length, mediolateral (LongX) and anterior-posterior deviations (long Y) were monitored...
September 2016: Annals of Physical and Rehabilitation Medicine
Marie Lumeau, Mathieu Lempereur, Emmanuel Sonnet, Olivier Remy Neris
OBJECTIVE: Distal sensorimotor polyneuropathy (DPN) is a leading risk factor of developing ulcer, including increased pressures at the forefoot. The rocker sole shoes are prescribed to decrease pressures but could induce instability [1]. The aim of this study was to compare the postural stability between normal shoes (NS) and rocker sole shoes (RSS) in patients with type 2 diabetes and DPN. MATERIAL/PATIENTS AND METHODS: In this preliminary, randomized, controlled study, NS and RSS were compared during static standing and gait...
September 2016: Annals of Physical and Rehabilitation Medicine
Katharina Marie Steiner, Anne Enders, Wiebke Thier, Giorgi Batsikadze, Nicolas Ludolph, Winfried Ilg, Dagmar Timmann
Transcranial direct current stimulation (tDCS) of the cerebellum is of increasing interest as a non-invasive technique to modulate motor performance and learning in health and disease. Previous studies have shown that cerebellar tDCS facilitates reach adaptation and associative motor learning in healthy subjects. In the present study it was tested whether cerebellar tDCS improves learning of a complex whole body motor skill. Because this task involves learning of posture and balance likely including learning of a new motor sequence and cognitive strategies, cerebellar tDCS was applied over midline cerebellar structures and the posterolateral cerebellar hemispheres...
2016: PloS One
Melissa C Kilby, Peter C M Molenaar, Semyon M Slobounov, Karl M Newell
The experiment was setup to investigate the control of human quiet standing through the manipulation of augmented visual information feedback of selective properties of the motion of two primary variables in postural control: center of pressure (COP) and center of mass (COM). Five properties of feedback information were contrasted to a no feedback dual-task (watching a movie) control condition to determine the impact of visual real-time feedback on the coordination of the joint motions in postural control in both static and dynamic one-leg standing postures...
September 19, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
Taegyu Kim, Eunkuk Kim, Hokyung Choi
OBJECTIVE: To determine whether a neuromuscular rehabilitation program can improve postural stability, and ankle evertor strength, and to examine the temporal changes and persistence of the rehabilitation effects in athletes with chronic ankle instability (CAI). DESIGN: A total of 21 national women's field hockey players participated in this study (CAI, n = 12; control, n = 9). Main outcome measures included isokinetic ankle evertor strength (peak torque, PT; total work, TW) at 30°/s, 60°/s, 90°/s and 120°/s, mediolateral stability index (MSI), and dynamic stability test (TCT)...
August 24, 2016: Journal of Sport Rehabilitation
Shahrzad Mohammadi Rad, Mahyar Salavati, Ismail Ebrahimi Takamjani, Behnam Akhbari, Shiva Sherafat, Hossein Negahban, Pezhman Lali, Masood Mazaheri
PURPOSE: To compare the effect of dual-tasking on postural stability between patients with anterior cruciate ligament reconstruction (ACL-R) and healthy controls. METHODS: Single-limb postural stability was assessed in 17 athletes with ACL-R and 17 healthy matched athletes while standing on a Biodex Balance System platform in four conditions: stability level of 8 (i.e. more stable support surface) with eyes open; stability level of 8 with eyes closed; stability level of 6 (i...
August 24, 2016: Journal of Sport Rehabilitation
Marcos Rossi-Izquierdo, Andrés Soto-Varela, Arne Ernst, Juan Pedro Rubio-Rodríguez, Sofía Santos-Pérez, Ángel Sesar, Miguel Alberte-Woodward, Mónica Guijarro-Del Amo, Elena San Román-Rodríguez, Ana Faraldo-García, Alfonso Zubizarreta-Gutiérrez, Dietmar Basta
OBJECTIVE: Impaired balance in patients with Parkinson's disease (PD) leads to loss of balance and frequent falls. Computerized dynamic posturography allows the assessment of stance tasks whereas mobile posturography analyzes the balance in free-field conditions, where falls among PD patients commonly occur (e.g. sitting down or standing up). The aim of the present study is to assess postural stability in PD patients with both techniques. STUDY DESIGN: Prospective study...
October 2016: Otology & Neurotology
Revital Gandelman-Marton, Aharon Arlazoroff, Zeevi Dvir
OBJECTIVE: Dizziness is a common complaint in patients following mild head or neck trauma, but neurological signs are usually rare or absent. The aim of the study was to compare postural control in patients with different types of head and neck trauma to healthy subjects. METHODS: Balance function was evaluated by computerized dynamic platform posturography (CDPP) in 57 dizzy patients with whiplash injury (n = 11), mild head trauma without loss of consciousness (HTNLC) (n = 23), whiplash injury and mild head trauma without loss of consciousness (WHTNLC) (n = 12) and mild head trauma with loss of consciousness (n = 11) and in 14 healthy subjects...
September 14, 2016: Brain Injury: [BI]
Dong Sun, Yaodong Gu, Qichang Mei, Yanhao Shao, Jianjun Sun, Justin Fernandez
The authors aimed to investigate female balance or stability control with comparative analysis of the center of pressure trajectory and plantar pressure distribution with different high-heeled shoes while standing on a dynamic surface with multidirectional perturbations. College females with at least 2 years' history of wearing high-heel shoes voluntarily participated in the test with a Novel Pedar insole (Novel, GmBH, Munich, Germany. With heels height increasing, the pressure time integral obviously transfer to the medial forefoot region, with center of pressure trajectory medially deviated significantly, either under anteroposterior or mediolateral perturbations...
September 2, 2016: Journal of Motor Behavior
Paul N Whitehead, Timothy C Sell, Mita Lovalekar, Matthew E Darnell, Nicholas R Heebner, John P Abt, Scott M Lephart
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
Jakob Škarabot, Neil Cronin, Vojko Strojnik, Janne Avela
The bilateral deficit phenomenon, characterized by a reduction in the amount of force from a single limb during maximal bilateral actions, has been shown in various movement tasks, contraction types and different populations. However, bilateral deficit appears to be an inconsistent phenomenon, with high variability in magnitude and existence, and seems to be plastic, as bilateral facilitation has also been shown to occur. Furthermore, many mechanisms underlying this phenomenon have been proposed over the years, but still remain largely unknown...
August 31, 2016: European Journal of Applied Physiology
Massimiliano Pau, Federico Mereu, Marco Melis, Bruno Leban, Federica Corona, Gianfranco Ibba
PURPOSE: The aim of this study is to assess the effect of actual match effort on dynamic balance abilities in young elite soccer players. METHODS: Seventeen Under 15 male players who compete at national level participated in the study. Their dynamic balance was assessed by having them jump starting with both feet on the ground in a standing position and land on one foot only. Their vertical time to stabilization (vTTS) and postural sway were calculated before and after 35 min of an unofficial match...
May 21, 2016: Physical Therapy in Sport
Trevor D Magnotti, Danielle McElhiney, Jeffrey A Russell
Lower extremity injury is prevalent in marching musicians, and poor postural stability is a possible risk factor for this. The external load of an instrument may predispose these performers to injury by decreasing postural stability. The purpose of this study was to determine the relationship between instrument load and static and dynamic postural stability in this population. Fourteen university marching musicians were recruited and completed a balance assessment protocol on a force platform with and without their instrument...
September 2016: Medical Problems of Performing Artists
Mathieu Gueugnon, Robin N Salesse, Alexandre Coste, Zhong Zhao, Benoît G Bardy, Ludovic Marin
Human interaction often relies on socio-motor improvisation. Creating unprepared movements during social interaction is not a random process but relies on rules of synchronization. These situations do not only involve people to be coordinated, but also require the adjustment of their posture in order to maintain balance and support movements. The present study investigated posture in such a context. More precisely, we first evaluated the impact of amplitude and complexity of arm movements on posture in solo situation...
2016: Frontiers in Psychology
Jessie R Oldham, Barry A Munkasy, Kelsey M Evans, Erik A Wikstrom, Thomas A Buckley
Impaired postural control is a cardinal symptom following concussion. Planned gait termination (GT) is a non-novel, dynamic task that challenges postural control in individuals with neurological deficits, and it could be an impactful measure for identifying dynamic postural control impairments following concussion. Therefore, the purpose of this study was to assess acute post-concussion dynamic postural control utilizing a planned GT task. The concussion participants (n=19, age: 19.0±0.8years, height: 177...
September 2016: Gait & Posture
Nancy L Low Choy, Mary-Therese M Lucey, Susan L Lewandowski, Benedict J Panizza
OBJECTIVES/HYPOTHESIS: To investigate balance, community mobility, gaze instability, and dizziness handicap and assess falls risk in people who are conservatively managed with small vestibular schwannoma (VS). STUDY DESIGN: Cross-sectional study with controls. METHODS: The study involved 18 people (mean age 58.7 ± 12.2 years) diagnosed with VS (<12 mm) and 22 age-matched controls (mean age 56.9 ± 8.0 years). Measures included standing on firm and foam surfaces with feet apart, then together with eyes open and closed, Timed Up and Go (TUG) test and dual TUG test, Dynamic Gait Index, 6-Minute Walk Test, Halmagyi Impulse Test, Dynamic Visual Acuity Test, and the Dizziness Handicap Inventory...
August 13, 2016: Laryngoscope
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