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Postural control

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https://www.readbyqxmd.com/read/29786465/trunk-stability-enabled-by-non-invasive-spinal-electrical-stimulation-after-spinal-cord-injury
#1
Mrinal Rath, Albert H Vette, Shyamsundar Ramasubramaniam, Kun Li, Joel Burdick, Victor Reggie Edgerton, Yury Gerasimenko, Dimitry Sayenko
Electrical neuromodulation of spinal networks improves the control of movement of the paralyzed limbs after spinal cord injury (SCI). However, the potential of non-invasive spinal stimulation to facilitate postural trunk control during sitting in humans with SCI has not been investigated. We hypothesized that transcutaneous electrical stimulation of the lumbosacral enlargement can improve trunk posture. Eight participants with non-progressive SCI, C3-T9, AIS A or C, performed different motor tasks during sitting...
May 22, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29786456/what-everybody-should-know-about-postural-changes
#2
Benoit Dugué, Giovanni Lombardi, Giuseppe Banfi
Posture changes have been known for a long time to influence the concentration of many analytes in blood especially macromolecules. It is very clear that when someone switches from supine to sitting or standing or from sitting to standing a hemoconcentration is induced. Similarly, when someone switches from standing to sitting or lying a hemodilution occurs. In the context of clinical chemistry, rules have been issued to buffer the impact of postural changes close to the blood specimen collection (e.g. 15 min of seated rest before the blood puncture)...
May 22, 2018: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/29785097/inter-gender-differences-of-balance-indicators-in-persons-60-90-years-of-age
#3
Ewa Puszczalowska-Lizis, Przemyslaw Bujas, Slawomir Jandzis, Jaroslaw Omorczyk, Marek Zak
Introduction: Precision of movements responsible for maintaining balance deteriorates with age due to natural involutionary processes, thus prompting a research question whether the values of gender-related stability indicators might differ significantly among the study subjects over 60 years of age. Methods: The study group comprised 136 seniors (89 women, 47 men; aged 60-90 years). The CQ-Stab 2P 2-platform posturograph was used as the main research device, whereas the Mann-Whitney U -test was used to evaluate the gender-related differences in the average level of variables...
2018: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/29784246/the-effect-of-a-maternity-support-belt-on-static-stability-and-posture-in-pregnant-and-non-pregnant-women
#4
Marie Elena Bey, Adamantios Arampatzis, Kirsten Legerlotz
PURPOSE: Physical and hormonal changes during pregnancy are thought to affect balance and injury risk, with increased numbers of falls being reported. A maternity support belt (MSB) has been suggested to stabilize the pelvis and to enhance balance. The purpose of this study was therefore to investigate the effect of an MSB on postural stability in different trimesters of pregnancy. METHODS: Postural stability was assessed in the first (T1, n = 30), second (T2, n = 30) and third trimester (T3, n = 30) of pregnancy and compared to non-pregnant controls (n = 30), using a portable force plate...
May 18, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29783715/location-location-location-signals-in-muscle-specification
#5
REVIEW
Chih-Ning Chang, Chrissa Kioussi
Muscles control body movement and locomotion, posture and body position and soft tissue support. Mesoderm derived cells gives rise to 700 unique muscles in humans as a result of well-orchestrated signaling and transcriptional networks in specific time and space. Although the anatomical structure of skeletal muscles is similar, their functions and locations are specialized. This is the result of specific signaling as the embryo grows and cells migrate to form different structures and organs. As cells progress to their next state, they suppress current sequence specific transcription factors (SSTF) and construct new networks to establish new myogenic features...
May 18, 2018: Journal of Developmental Biology
https://www.readbyqxmd.com/read/29783068/reliability-of-the-star-excursion-balance-test-and-two-new-similar-protocols-to-measure-trunk-postural-control
#6
Diego López-Plaza, Casto Juan-Recio, David Barbado, Iñaki Ruiz-Pérez, Francisco J Vera-Garcia
BACKGROUND: Although the Star Excursion Balance test (SEBT) has shown a good intra-session reliability the inter-session reliability of this test has not been deeply studied. Furthermore, there is an evident high influence of the lower-limbs in the performance of the SEBT so even if it has been used to measure core stability it is possibly not the most suitable measurement. OBJECTIVE: The aims of this study were: i) to assess the absolute and relative between-session reliability of the SEBT and two novel variations of this test to assess trunk postural control while sitting, i...
May 18, 2018: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/29782218/postural-control-and-physiological-responses-to-a-simulated-match-in-u-20-judo-competitors
#7
Luis Santos, Javier Fernández-Río, Eliseo Iglesias-Soler, Miguel Blanco-Traba, Markus Due Jakobsen, Vicente González-Díez, Emerson Franchini, Carlos Gutiérrez, Xurxo Dopico-Calvo, Eduardo Carballeira-Fernández, William Amonette, Oscar Suman
The aim was to evaluate the effects of judo combat on the athletes' postural control (PC) and physiological loading before, during and after a simulated match. Seventeen under-20 regional and national level athletes completed one modified 7-min match. At baseline, during the combat (3rd and 7th minutes) and 2-min post-match centre of pressure (CoP) parameters were assessed. Heart rate (HR), blood lactate (BLa) and rating of perceived exertion (RPE) and local RPE (LRPE) were collected. Significant increments were observed in CoP mean positioning and velocity at 3rd and 7th minutes, but the CoP deviation in both axes was unaffected...
May 21, 2018: Sports Biomechanics
https://www.readbyqxmd.com/read/29782181/effectiveness-of-an-osteopathic-abdominal-manual-intervention-in-pain-thresholds-lumbopelvic-mobility-and-posture-in-women-with-chronic-functional-constipation
#8
María José Martínez-Ochoa, Juan Carlos Fernández-Domínguez, Jose Miguel Morales-Asencio, Javier González-Iglesias, François Ricard, Ángel Oliva-Pascual-Vaca
OBJECTIVES: To assess the effect of an osteopathic abdominal manual intervention (AMI) on pressure pain thresholds (PPTs), mobility, hip flexibility, and posture in women with chronic functional constipation. DESIGN: Randomized, double-blind placebo-controlled trial. SETTING/LOCATION: Subjects were recruited for the study by referral from different gastroenterology outpatient clinics in the city of Madrid (Spain). SUBJECTS: Sixty-two patients suffering from chronic functional constipation according to the guidelines of the Congress of Rome III...
May 21, 2018: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
https://www.readbyqxmd.com/read/29781982/the-motor-in-implicit-motor-sequence-learning-a-foot-stepping-serial-reaction-time-task
#9
Yue Du, Jane E Clark
This protocol describes a modified serial reaction time (SRT) task used to study implicit motor sequence learning. Unlike the classic SRT task that involves finger-pressing movements while sitting, the modified SRT task requires participants to step with both feet while maintaining a standing posture. This stepping task necessitates whole body actions that impose postural challenges. The foot-stepping task complements the classic SRT task in several ways. The foot-stepping SRT task is a better proxy for the daily activities that require ongoing postural control, and thus may help us better understand sequence learning in real-life situations...
May 3, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29781935/balance-training-reduces-postural-sway-and-improves-sport-specific-performance-in-visually-impaired-cross-country-skiers
#10
Alexander Kurz, Benedikt Lauber, Steffen Franke, Christian Leukel
Kurz, A, Lauber, B, Franke, S, and Leukel, C. Balance training reduces postural sway and improves sport-specific performance in visually impaired cross-country skiers. J Strength Cond Res XX(X): 000-000, 2018-Balance training is highly effective in reducing sport injuries and causes improvements in postural stability and rapid force production. So far, the positive effects of balance training have been described for healthy athletes. In the present experiments, we questioned whether athletes with disabilities of the visual system can also benefit from balance training...
May 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29781789/the-influence-of-wearing-ski-boots-with-different-rigidity-characteristics-on-postural-control
#11
Frédéric Noé, Xavier García-Massó, Pauline Delaygue, Audrey Melon, Thierry Paillard
External supports that reduce ankle joint mobility such as ski-boots can impair postural control of healthy participants. Although this disruptive effect has been attributed to the rigidity of the external supports, the results remained controversial and no study has been conducted in order to evaluate the influence of ski-boots rigidity. Hence, the question about the influence of ankle support rigidity on postural control remains open. This study was therefore undertaken in order to investigate the effect of ski-boots rigidity on postural control...
May 21, 2018: Sports Biomechanics
https://www.readbyqxmd.com/read/29781516/cardiac-autonomic-modulation-and-long-term-use-of-amiodarone-in-patients-with-chronic-chagasic-cardiopathy
#12
Henriette Elana Fortes Silva, Renan Sandoval de Almeida, Danilo Batista Silveira, Maurício Llaguno, Luiz Antônio Pertili Rodrigues Resende, Valdo José Dias da Silva, Dalmo Correia
BACKGROUND: Patients with chronic Chagas cardiopathy (CCC), which may be associated with cardiac arrhythmias, frequently use amiodarone, an anti-arrhythmic drug that, experimentally, appears to modulate the cardiac autonomic function. OBJECTIVE: The present cross-sectional observational study aimed to evaluate autonomic cardiac modulation in patients with CCC undergoing chronic amiodarone therapy. METHODS: Three groups were investigated: Group 1 included patients with CCC not treated with amiodarone (n = 27); Group 2 included patients with CCC with prolonged use (at least 6 months) of amiodarone (n = 16); and Group 3 including non-chagasic control patients (n = 23)...
May 21, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29780319/day-to-day-variability-of-postural-sway-and-its-association-with-cognitive-function-in-older-adults-a-pilot-study
#13
Julia M Leach, Martina Mancini, Jeffrey A Kaye, Tamara L Hayes, Fay B Horak
Introduction : Increased variability in motor function has been observed during the initial stages of cognitive decline. However, the natural variability of postural control, as well as its association with cognitive status and decline, remains unknown. The objective of this pilot study was to characterize the day-to-day variability in postural sway in non-demented older adults. We hypothesized that older adults with a lower cognitive status would have higher day-to-day variability in postural sway. Materials and Methods : A Nintendo Wii balance board (WBB) was used to quantify postural sway in the home twice daily for 30 days in 20 non-demented, community-dwelling older adults: once under a single-task condition and once under a dual-task condition (using a daily word search task administered via a Nook tablet)...
2018: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29779092/neurodynamic-evaluation-and-nerve-conduction-studies-in-patients-with-forward-head-posture
#14
Tugba Ozudogru Celik, Burcu Duyur Cakit, Baris Nacir, Hakan Genc, Mehmet Onat Cakit, Aynur Karagoz
Forward head posture (FHP) is one of the most frequently seen problems. The aim of this study was to evaluate the neurodynamic tests and peripheral nerve conductions of upper extremity in patients with FHP. The study population included 100 patients with upper extremity and neck problems and 34 healthy individuals as a control group. Craniovertebral angle measurement was used to determine forward head posture. Stretch tests for radial, ulnar and median nerves were performed. Nerve conductions of bilateral median, radial, ulnar and medial antebrachial cutaneous (MAC) nerves were examined in all patients included in the study...
May 19, 2018: Acta Neurologica Belgica
https://www.readbyqxmd.com/read/29778979/exploring-the-relationship-between-stability-and-variability-of-the-centre-of-mass-and-centre-of-pressure
#15
Roshanth Rajachandrakumar, Jotvarinder Mann, Alison Schinkel-Ivy, Avril Mansfield
BACKGROUND: There are competing perspectives in the literature regarding the role of movement variability in quiet standing and balance control. Some view high variability as indicative of poor balance control and a contributor to increased fall risk, whereas others view variability as beneficial in providing sensory information that aids balance control. RESEARCH QUESTION: This study aimed to help to clarify the role of variability in balance control by testing two competing hypotheses: that increased variability would lead to instability, or that increased variability would improve stability, where stability is defined as the ability to respond to a perturbation...
May 9, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29778898/examining-the-diagnostic-accuracy-of-static-postural-stability-measures-in-differentiating-among-knee-osteoarthritis-patients-with-mild-and-moderate-to-severe-radiographic-signs
#16
Nahid Pirayeh, Mohammad-Jafar Shaterzadeh-Yazdi, Hossein Negahban, Mohammad Mehravar, Neda Mostafaee, Amal Saki-Malehi
BACKGROUND: Clinicians need a reliable and accurate tools that can best identify and classify balance impairments between mild and moderate to severe grades of knee osteoarthritis (OA). RESEARCH QUESTION: This study was designed to investigate the accuracy of postural measurements to discriminate between these two groups of knee OA. METHODS: A total of 130 patients with knee OA based on the Kellgren-Lawrence (KL) grading scale were categorized into 65 patients with mild (a KL grade≤ 2) and 65 patient with moderate to severe (a KL grade≥3) radiographic sign...
May 12, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29777980/trunk-postural-adjustments-medium-term-reliability-and-correlation-with-changes-of-clinical-outcomes-following-an-8-week-lumbar-stabilization-exercise-program
#17
Jean-Alexandre Boucher, Richard Preuss, Sharon M Henry, Marilee Nugent, Christian Larivière
BACKGROUND: Low back pain (LBP) has been previously associated with delayed anticipatory postural adjustments (APAs) determined by trunk muscle activation. Lumbar stabilization exercise programs (LSEP) for patients with LBP may restore the trunk neuromuscular control of the lumbar spine, and normalize APAs. This exploratory study aimed at testing the reliability of EMG and kinematics-based postural adjustment measures over an 8-week interval, assessing their sensitivity to LBP status and treatment and examining their relationship with clinical outcomes...
April 22, 2018: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29777505/a-fingertip-force-prediction-model-for-grasp-patterns-characterised-from-the-chaotic-behaviour-of-eeg
#18
Rinku Roy, Debdeep Sikdar, Manjunatha Mahadevappa, C S Kumar
A stable grasp is attained through appropriate hand preshaping and precise fingertip forces. Here, we have proposed a method to decode grasp patterns from motor imagery and subsequent fingertip force estimation model with a slippage avoidance strategy. We have developed a feature-based classification of electroencephalography (EEG) associated with imagination of the grasping postures. Chaotic behaviour of EEG for different grasping patterns has been utilised to capture the dynamics of associated motor activities...
May 19, 2018: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/29777115/a-randomized-controlled-pilot-trial-of-game-based-training-in-individuals-with-spinocerebellar-ataxia-type-3
#19
Ray-Yau Wang, Fang-Yi Huang, Bing-Wen Soong, Shih-Fong Huang, Yea-Ru Yang
Exergames are interactive video games used for exercise and may have therapeutic value in people with degenerative ataxia. The purpose of this study was to investigate potential effects of exergaming training on cerebellar ataxia in people with spinocerebellar ataxia type 3 (SCA3). Nine individuals with SCA3 were recruited and randomized to either exergaming or conventional group for a 4-week training period. The severity of ataxia was measured as the primary outcome by the Scale for the Assessment and Rating of Ataxia (SARA) and by the directional control of the limit of stability test...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29775984/static-postural-stability-in-chronic-ankle-instability-an-ankle-sprain-and-healthy-ankles
#20
Yong Ung Kwon
To identify the single leg balance (SLB) test that discriminates among healthy, coper, and chronic ankle instability (CAI) groups and to determine effects of ankle muscles on the balance error scoring system (BESS) among the three populations. 60 subjects (20 per group) performed the SLB test with eyes open (EO) and eyes closed (EC). Normalized mean amplitude (NMA) of the tibia anterior (TA), fibularis longus (FL), and medial gastrocnemius (MG) muscles and BESS were measured while performing the SLB test. The coper group had a lower error score than the CAI group in the EC...
May 18, 2018: International Journal of Sports Medicine
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