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Postural control

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https://www.readbyqxmd.com/read/27923482/reproducibility-of-a-new-signal-processing-technique-to-assess-joint-sway-during-standing
#1
Fabian Marcel Rast, Judith Verena Graser, André Meichtry, Markus Josef Ernst, Christoph Michael Bauer
Postural control strategies can be investigated by kinematic analysis of joint movements. However, current research is focussing mainly on the analysis of centre of pressure excursion and lacks consensus on how to assess joint movement during postural control tasks. This study introduces a new signal processing technique to comprehensively quantify joint sway during standing and evaluates its reproducibility. Fifteen patients with non-specific low back pain and ten asymptomatic participants performed three repetitions of a 60-second standing task on foam surface...
November 29, 2016: Journal of Biomechanics
https://www.readbyqxmd.com/read/27923177/the-effect-of-exergaming-on-knee-proprioception-in-older-men-a-randomized-controlled-trial
#2
Hassan Sadeghi, Mohammad Nazrul Hakim, Tengku Aizan Hamid, Saidon Bin Amri, Mohsen Razeghi, Mohammadreza Farazdaghi, Elham Shakoor
BACKGROUND: Proprioception is the ability to sense the body position, muscle sense, joint stability and posture. As balance decreases during the process of aging, knee proprioception has a critical role in body balance and daily activities. Exergaming has shown to be a potentially effective and more enjoyable form of exercise delivery. OBJECTIVE: The purpose of this study was to determine the effect of an 8-week Xbox Kinect exercise program on knee proprioception in healthy older adults...
November 23, 2016: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/27923175/errors-in-the-ankle-plantarflexor-force-production-are-related-to-the-gait-deficits-of-individuals-with-multiple-sclerosis
#3
Brenda L Davies, Rashelle M Hoffman, Kathleen Healey, Rana Zabad, Max J Kurz
BACKGROUND: Individuals with multiple sclerosis (MS) often have limited mobility that is thought to be due to the neuromuscular impairments of the ankle. Greater isometric motor control of the ankle has been associated with better standing postural balance but its relationship to mobility is less understood. The objectives of this investigation were to quantify the motor control of the ankle plantarflexors of individuals with MS during a dynamic isometric motor task, and explore the relationship between the ankle force control and gait alterations...
December 3, 2016: Human Movement Science
https://www.readbyqxmd.com/read/27915585/the-impact-of-office-chair-features-on-lumbar-lordosis-intervertebral-joint-and-sacral-tilt-angles-a-radiographic-assessment
#4
Diana De Carvalho, Diane Grondin, Jack Callaghan
BACKGROUND: The purpose of this study was to determine which office chair feature is better at improving spine posture in sitting. METHOD: Participants (n=28) were radiographed in standing, maximum flexion and seated in four chair conditions: control, lumbar support, seat pan tilt and backrest with scapular relief. Measures of lumbar lordosis, intervertebral joint angles and sacral tilt were compared between conditions and sex. RESULTS: Sitting consisted of approximately 70% of maximum range of spine flexion...
December 3, 2016: Ergonomics
https://www.readbyqxmd.com/read/27915367/the-virtual-reality-head-mounted-display-oculus-rift-induces-motion-sickness-and-is-sexist-in-its-effects
#5
Justin Munafo, Meg Diedrick, Thomas A Stoffregen
Anecdotal reports suggest that motion sickness may occur among users of contemporary, consumer-oriented head-mounted display systems and that women may be at greater risk. We evaluated the nauseogenic properties of one such system, the Oculus Rift. The head-mounted unit included motion sensors that were sensitive to users' head movements, such that head movements could be used as control inputs to the device. In two experiments, seated participants played one of two virtual reality games for up to 15 min. In Experiment 1, 22% of participants reported motion sickness, and the difference in incidence between men and women was not significant...
December 3, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27915224/the-relative-and-absolute-reliability-of-center-of-pressure-trajectory-during-gait-initiation-in-older-adults
#6
Roya Khanmohammadi, Saeed Talebian, Mohammad Reza Hadian, Gholamreza Olyaei, Hossein Bagheri
It has been thought that for scientific acceptance of a parameter, its psychometric properties such as reliability, validity and responsiveness have critical roles. Therefore, this study was conducted to estimate how many trials are required to obtain a reliable center of pressure (COP) parameter during gait initiation (GI) and to investigate the effect of number of trials on the relative and absolute reliability. Twenty older adults participated in the study. Subjects began stepping over the force platform in response to an auditory stimulus...
November 28, 2016: Gait & Posture
https://www.readbyqxmd.com/read/27914727/beat-gestures-and-postural-control-in-youth-at-ultrahigh-risk-for-psychosis
#7
K Juston Osborne, Jessica A Bernard, Tina Gupta, Derek J Dean, Zachary Millman, Teresa Vargas, Ivanka Ristanovic, Jason Schiffman, Vijay A Mittal
Beat gestures, rhythmic hand movements that co-occur with speech, appear to be uniquely associated with the cerebellum in healthy individuals. This behavior may also have relevance for psychosis-risk youth, a group characterized by cerebellar dysfunction. This study examined beat gesture frequency and postural sway (a sensitive index of cerebellar functioning) in youth at ultrahigh risk (UHR) for psychosis. Results indicated that decreased beat gesture frequency, but not self-regulatory movement, is associated with elevated postural sway, suggesting that beat gestures may be an important biomarker in this critical population...
November 30, 2016: Schizophrenia Research
https://www.readbyqxmd.com/read/27914396/laryngeal-muscular-control-of-vocal-fold-posturing-numerical-modeling-and-experimental-validation
#8
Jun Yin, Zhaoyan Zhang
A three-dimensional continuum model of vocal fold posturing was developed to investigate laryngeal muscular control of vocal fold geometry, stiffness, and tension, which are difficult to measure in live humans or in vivo models. This model was able to qualitatively reproduce in vivo experimental observations of laryngeal control of vocal fold posturing, despite the many simplifications which are necessary due to the lack of accurate data of laryngeal geometry and material properties. The results present a first comprehensive study of the co-variations between glottal width, vocal fold length, stiffness, tension at different conditions of individual, and combined laryngeal muscle activation...
September 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27914309/unique-approach-to-sensorimotor-training-with-a-new-device-combining-air-cushion-with-stochastic-translations-a-prospective-randomized-controlled-clinical-trial
#9
Christian Mittermaier, Maximilian Schindler, Benjamin Loader, Thomas Waldhoer, Clemens Ambrozy, Richard Crevenna, Karin Pieber
Sensorimotor training with a wide variety of available devices represents an important component in rehabilitation and prevention of different sports injuries and chronic diseases. The purpose of this study was to evaluate the effects of a sensorimotor training with a newly developed device, which consists of an instable platform moving on an air cushion, providing dynamic balance training by tilting and unanticipated stochastic translations on postural control. Seventy-two healthy young subjects were included in this prospective, randomized, controlled, and observer-blinded study...
November 25, 2016: Gait & Posture
https://www.readbyqxmd.com/read/27913929/-inpatient-multimodal-pain-therapy-additive-value-of-neuromuscular-core-stability-exercises-for-chronic-back-pain
#10
F Giesche, H Streicher, M Maiwald, P Wagner
INTRODUCTION: The medical and healthcare economic burden caused by chronic lumbar back pain (CLBP) requires the use of interdisciplinary treatment approaches. The present study aimed to evaluate whether the effectiveness of inpatient multimodal pain therapy (MPT, operations and procedures (OPS) coding 8-918.02), can be increased by implementing additional neuromuscular core stability exercises (NCSE). MATERIAL AND METHODS: As part of a prospective controlled study, subjects with CLBP (n = 48, 17 males, 58...
December 2, 2016: Der Schmerz
https://www.readbyqxmd.com/read/27912936/effects-of-mind-body-exercises-on-the-physiological-and-psychosocial-well-being-of-individuals-with-parkinson-s-disease-a-systematic-review-and-meta-analysis
#11
REVIEW
JoJo Yan Yan Kwok, Kai Chow Choi, Helen Yue Lai Chan
OBJECTIVES: The effects of mind-body exercises on individuals with chronic illnesses have attracted increasing attention. However, little effort had been made to systematically review the effects of these mind-body exercises on individuals with Parkinson's disease (PD). This review aimed to appraise the current evidence of the effects of mind-body exercises on the physiological and psychological outcomes for the PD population. DESIGN: Systematic review and meta-analysis of randomized controlled trials...
December 2016: Complementary Therapies in Medicine
https://www.readbyqxmd.com/read/27911944/specific-stimuli-induce-specific-adaptations-sensorimotor-training-vs-reactive-balance-training
#12
Kathrin Freyler, Anne Krause, Albert Gollhofer, Ramona Ritzmann
Typically, balance training has been used as an intervention paradigm either as static or as reactive balance training. Possible differences in functional outcomes between the two modalities have not been profoundly studied. The objective of the study was to investigate the specificity of neuromuscular adaptations in response to two balance intervention modalities within test and intervention paradigms containing characteristics of both profiles: classical sensorimotor training (SMT) referring to a static ledger pivoting around the ankle joint vs...
2016: PloS One
https://www.readbyqxmd.com/read/27911755/transformation-of-vestibular-signals-for-the-control-of-standing-in-humans
#13
Patrick A Forbes, Billy L Luu, H F Machiel Van der Loos, Elizabeth A Croft, J Timothy Inglis, Jean-Sébastien Blouin
: During standing balance, vestibular signals encode head movement and are transformed into coordinates that are relevant to maintaining upright posture of the whole body. This transformation must account for head-on-body orientation as well as the muscle actions generating the postural response. Here, we investigate whether this transformation is dependent upon a muscle's ability to stabilize the body along the direction of a vestibular disturbance. Subjects were braced on top of a robotic balance system that simulated the mechanics of standing while being exposed to an electrical vestibular stimulus that evoked a craniocentric vestibular error of head roll...
November 9, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27909555/effect-of-dual-type-oligosaccharides-on-constipation-in-loperamide-treated-rats
#14
Sung Hee Han, Ki Bae Hong, Eun Young Kim, So Hyun Ahn, Hyung Joo Suh
BACKGROUND/OBJECTIVES: Constipation is a condition that can result from intestinal deformation. Because humans have an upright posture, the effects of gravity can cause this shape deformation. Oligosaccharides are common prebiotics and their effects on bowel health are well known. However, studies of the physiological functionality of a product that contains both lactulose and galactooligosaccharides are insufficient. We investigated the constipation reduction effect of a dual-type oligosaccharide, Dual-Oligo, in loperamide-treated rats...
December 2016: Nutrition Research and Practice
https://www.readbyqxmd.com/read/27907000/whole-body-vibration-treatments-in-postmenopausal-women-can-improve-bone-mineral-density-results-of-a-stimulus-focussed-meta-analysis
#15
Antonio Fratini, Tecla Bonci, Anthony M J Bull
Whole body vibration treatment is a non-pharmacological intervention intended to stimulate muscular response and increase bone mineral density, particularly for postmenopausal women. The literature related to this topic is controversial, heterogeneous, and unclear despite the prospect of a major clinical effect.The aim of this study was to identify and systematically review the literature to assess the effect of whole body vibration treatments on bone mineral density (BMD) in postmenopausal women with a specific focus on the experimental factors that influence the stimulus...
2016: PloS One
https://www.readbyqxmd.com/read/27906984/balance-and-muscle-strength-in-elderly-women-who-dance-samba
#16
Marcos Maurício Serra, Angelica Castilho Alonso, Mark Peterson, Luis Mochizuki, Júlia Maria D'Andréa Greve, Luiz Eugênio Garcez-Leme
Considering the growth of the aging population, and the increasing risk for falls and related morbidity, it is vital to seek efficient, comprehensive, and culturally relevant prevention programs for elderly people to reduce risks for falls. The aim of the present study was to evaluate the postural balance and muscle strength among women participating in the "Wing of Baianas" in the carnival parades. One hundred and ten women, with an average age of 67.4±5.9 years, were divided into two groups: Baianas group-elderly participants of the carnival parades in the "Wing of Baianas", and a Control group of women who do not dance samba...
2016: PloS One
https://www.readbyqxmd.com/read/27906065/dystrophin-deficient-dogs-with-reduced-myostatin-have-unequal-muscle-growth-and-greater-joint-contractures
#17
Joe N Kornegay, Daniel J Bogan, Janet R Bogan, Jennifer L Dow, Jiahui Wang, Zheng Fan, Naili Liu, Leigh C Warsing, Robert W Grange, Mihye Ahn, Cynthia J Balog-Alvarez, Steven W Cotten, Monte S Willis, Candice Brinkmeyer-Langford, Hongtu Zhu, Joe Palandra, Carl A Morris, Martin A Styner, Kathryn R Wagner
BACKGROUND: Myostatin (Mstn) is a negative regulator of muscle growth whose inhibition promotes muscle growth and regeneration. Dystrophin-deficient mdx mice in which myostatin is knocked out or inhibited postnatally have a less severe phenotype with greater total mass and strength and less fibrosis and fatty replacement of muscles than mdx mice with wild-type myostatin expression. Dogs with golden retriever muscular dystrophy (GRMD) have previously been noted to have increased muscle mass and reduced fibrosis after systemic postnatal myostatin inhibition...
April 4, 2016: Skeletal Muscle
https://www.readbyqxmd.com/read/27905392/-clinical-and-stabilometric-restructuring-of-patients-stability-during-balance-therapy-from-the-first-days-of-ischemic-stroke
#18
E A Plishkina, B N Bein
AIM: To study the process of recovery of postural function during stabilometric training with biofeedback (BFB) in patients with ischemic carotid stroke. MATERIAL AND METHODS: Forty-two patients underwent 10-day stabilometric training from the onset of stroke. Clinical and stabilometric parameters were assessed at 4 points: at baseline, after 5 sessions, after 10 sessions and after 3-4 months in the early recovery stage after discharge from the hospital. RESULTS: There was no correlation between the positive regress of neurologic symptoms and trends of stabilometry indicators...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/27903817/effects-of-orthostatic-hypotension-on-cognition-in-parkinson-disease
#19
Justin Centi, Roy Freeman, Christopher H Gibbons, Sandy Neargarder, Alexander O Canova, Alice Cronin-Golomb
OBJECTIVE: To investigate the relation between orthostatic hypotension (OH) and posture-mediated cognitive impairment in Parkinson disease (PD) using a cross-sectional and within-group design. METHODS: Individuals without dementia with idiopathic PD included 18 with OH (PDOH) and 19 without OH; 18 control participants were also included. Neuropsychological tests were conducted in supine and upright-tilted positions. Blood pressure was assessed in each posture. RESULTS: The PD groups performed similarly while supine, demonstrating executive dysfunction in sustained attention and response inhibition, and reduced semantic fluency and verbal memory (encoding and retention)...
November 30, 2016: Neurology
https://www.readbyqxmd.com/read/27900196/muscle-function-is-associated-with-future-patient-reported-outcomes-in-young-adults-with-acl-injury
#20
Vala Flosadottir, Ewa M Roos, Eva Ageberg
BACKGROUND/AIM: Consequences of an anterior cruciate ligament (ACL) injury include worse patient-reported outcomes (PROs) and a decrease in activity level. Muscle function can be improved by targeted exercise. Our aims were to investigate cross-sectional and longitudinal associations among lower extremity muscle function and PROs after ACL injury. METHODS: Fifty-four participants (15 women, mean 30 years) with ACL injury or reconstruction, from the Knee Anterior Cruciate Ligament, Nonsurgical versus Surgical Treatment (KANON) trial (ISRCTN84752559), were assessed with hop performance, muscle power and postural orientation 3 years (SD 0...
2016: BMJ Open Sport & Exercise Medicine
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