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Dynamic postural stability

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https://www.readbyqxmd.com/read/28934067/transient-effects-of-gaze-stability-exercises-on-postural-stability-in-patients-with-posterior-circulation-stroke
#1
Tsubasa Mitsutake, Maiko Sakamoto, Kozo Ueta, Etsuo Horikawa
The authors sought to investigate if short-term gaze stability exercises have an effect on postural stability of dynamic standing during neck movement in patients with posterior circulation stroke (PCS). Patients in both PCS and non-PCS groups were assigned to either an intervention or control group. The intervention group performed the gaze stability exercises for 10 min while the control group was merely resting. The center of pressure velocity was calculated to evaluate the postural stability. After intervention, PCS and non-PCS showed a significant reduction in center of pressure velocity during dynamic standing with eyes closed condition, and the PCS group showed a significant improvement in eye-opened condition...
September 21, 2017: Journal of Motor Behavior
https://www.readbyqxmd.com/read/28923138/orientation-preferences-and-motion-sickness-induced-in-a-virtual-reality-environment
#2
Wei Chen, Jian-Gang Chao, Yan Zhang, Jin-Kun Wang, Xue-Wen Chen, Cheng Tan
BACKGROUND: Astronauts' orientation preferences tend to correlate with their susceptibility to space motion sickness (SMS). Orientation preferences appear universally, since variable sensory cue priorities are used between individuals. However, SMS susceptibility changes after proper training, while orientation preferences seem to be intrinsic proclivities. The present study was conducted to investigate whether orientation preferences change if susceptibility is reduced after repeated exposure to a virtual reality (VR) stimulus environment that induces SMS...
October 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28916583/a-balance-and-proprioception-intervention-programme-to-enhance-combat-performance-in-military-personnel
#3
Shany Funk, T Jacob, D Ben-Dov, E Yanovich, O Tirosh, N Steinberg
BACKGROUND: Optimal functioning of the lower extremities under repeated movements on unstable surfaces is essential for military effectiveness. Intervention training to promote proprioceptive ability should be considered in order to limit the risk for musculoskeletal injuries. The aim of this study was to assess the effect of a proprioceptive intervention programme on static and dynamic postural balance among Israel Defense Forces combat soldiers. METHODS: Twenty-seven male soldiers, aged 18-20 years, from a physical fitness instructor's course, were randomly divided into two groups matched by age and army unit...
September 14, 2017: Journal of the Royal Army Medical Corps
https://www.readbyqxmd.com/read/28900569/there-are-no-biomechanical-differences-between-runners-classified-by-the-functional-movement-screen
#4
Rodrigo Ribeiro de Oliveira, Shalimá Figueirêdo Chaves, Yuri Lopes Lima, Márcio Almeida Bezerra, Gabriel Peixoto Leão Almeida, Pedro Olavo de Paula Lima
BACKGROUND: Running has been one of the main choices of physical activity in people seeking an active lifestyle. The Functional Movement Screen (FMS™) is a screening tool that aims to discern movement competency. PURPOSE: The purposes of this study were to compare biomechanical characteristics between two groups rated using the composite FMS™ score, and to analyze the influence of specific individual tests. The hypothesis was that the group that scored above 14 would demonstrate better performance on biomechanical tests than the group that scored below 14...
August 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28893202/preliminary-evaluation-of-prototype-footwear-and-insoles-to-optimise-balance-and-gait-in-older-people
#5
Hylton B Menz, Maria Auhl, Shannon E Munteanu
BACKGROUND: Footwear has the potential to influence balance in either a detrimental or beneficial manner, and is therefore an important consideration in relation to falls prevention. The objective of this study was to evaluate balance ability and gait patterns in older women while wearing prototype footwear and insoles designed to improve balance. METHODS: Older women (n = 30) aged 65 - 83 years (mean 74.4, SD 5.6) performed a series of laboratory tests of balance ability (postural sway on a foam rubber mat, limits of stability and tandem walking, measured with the Neurocom® Balance Master) and gait patterns (walking speed, cadence, step length and step width at preferred speed, measured with the GAITRite® walkway) while wearing (i) flexible footwear (Dunlop Volley™), (ii) their own footwear, and (iii) prototype footwear and insoles designed to improve dynamic balance...
September 11, 2017: BMC Geriatrics
https://www.readbyqxmd.com/read/28869638/evaluation-of-the-accuracy-of-the-postural-stability-measurement-with-the-y-balance-test-based-on-the-levels-of-the-biomechanical-parameters
#6
Robert Walaszek, Wiesław Chwała, Katarzyna Walaszek, Marcin Burdacki, Jarosław Błaszczuk
PURPOSE: The study of dynamic balance involves tests that assess the muscle control of spatial changes of the position of the centre of gravity over the base of support. The purpose of this work was to determine the structure of the Y-balance test and its accuracy based on the measurements of strength performance of the muscles acting on the knee joint as well as the flexibility and balance in boys aged 14 years. METHODS: The study included 43 schoolboys regularly participating in physical education lessons...
2017: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/28869628/the-influence-of-the-acoustic-stimulus-on-postural-stability
#7
Anna Majewska, Weronika Kawałkiewicz, Dorota Hojan-Jezierska, Agata Jezierska, Leszek Kubisz
PURPOSE: The purpose of this study was to assess if 65 dB and 4000 Hz stimuli affect postural stability of young normally hearing people. METHODS: Posturography examinations belong to clinical tests which evaluate the motor skills. Posturography can be divided into static posturography and dynamic posturography. In both static and dynamic posturography patient stays on the platform with opened and closed eyes, but in the case of dynamic one, platform is unstable...
2017: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/28869624/computerized-static-posturography-and-laterality-in-children-influence-of-age
#8
Sophie Bourelle, Nilanjan Dey, Dimitra Sifaki-Pistolla, Benoit Berge, Vincent Gautheron, Jerome Cottalorda, Redha Taiar
PURPOSE: The present study aims to explore relationships between footedness and posturographic assessment in children aged from 4 to 10. A real-time computerised device was used on a force plate for movement analysis. It requires a static posturography to assess postural control of children with the same handedness and footedness. METHODS: Thirty eight right-handed and right-footed children organized in three age groups of 4 to 6 years old, 6 to 8 years old and 8 to 10 years old participated in the study...
2017: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/28866428/ultrasound-imaging-transducer-motion-during-standing-postural-tasks-with-and-without-using-transducer-fixator
#9
F Ehsani, M Salavati, A M Arab, M H Dolati
BACKGROUND: Changes in the orientation of ultrasound (US) transducer relative to the body surface during dynamic standing tests can affect US measurements. OBJECTIVE: The purpose of the study was to evaluate ultrasound imaging transducer motion while measuring the lateral abdominal muscle thickness during standing tasks with and without using transducer fixator (TF). DESIGN: Cross-sectional experimental study. METHODS: A digital optical motion analysis system was used to assess the motions of US transducer during double-leg stance in different levels of platform stability of Biodex Balance System (BBS) (static, levels 6 and 3) with and without using TF in 45 healthy individuals...
August 24, 2017: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/28837917/aging-effect-on-step-adjustments-and-stability-control-in-visually-perturbed-gait-initiation
#10
Ruopeng Sun, Chuyi Cui, John B Shea
Gait adaptability is essential for fall avoidance during locomotion. It requires the ability to rapidly inhibit original motor planning, select and execute alternative motor commands, while also maintaining the stability of locomotion. This study investigated the aging effect on gait adaptability and dynamic stability control during a visually perturbed gait initiation task. A novel approach was used such that the anticipatory postural adjustment (APA) during gait initiation were used to trigger the unpredictable relocation of a foot-size stepping target...
August 18, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28805601/effect-of-oral-contraceptives-on-balance-in-women-a-randomized-controlled-trial
#11
Ahmed M Maged, Emad Salah, Ahmed M Kamel, Ahmed M Hussein, Hany Saad, Hadeer Meshaal, Wafaa M Kamal
OBJECTIVE: To detect the effect of combined oral contraceptive pills (COC) on dynamic postural balance in healthy middle aged women. MATERIALS AND METHODS: A prospective randomized controlled study included 200 patients classified into two groups. Group I received COC containing 30 μg of EE and 3 mg of drospirenone for 12 consecutive cycles and Group II received no treatment. Overall, medio-lateral and antero-posterior stability were measured using Biodex system after 12 months...
August 2017: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28802368/study-of-the-effects-of-hearing-on-static-and-dynamic-postural-function-in-children-using-cochlear-implants
#12
Malihah Mazaheryazdi, Abdollah Moossavi, Javad Sarrafzadah, Saeed Talebian, Shohreh Jalaie
OBJECTIVE: The present study aimed to evaluate the postural control perturbations by the center of pressure parameters in two main approaches, cochlear implant turned "on" and "off". METHODS: We included 25 children aged 8-10 years with unilateral cochlear implants and bilateral vestibular hypofunction deficit. To evaluate the postural function, each children was asked to stand on the force plate under 3 different conditions and cochlear implant turned "on" and "off": Condition (A) double stance from open eyes to closed eyes, Condition (B) double stance with open eyes engaging in the dual task and Condition (C) From double leg stance to one leg stance with open eyes for assessment of dynamic postural control...
September 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28801963/a-preliminary-study-of-static-and-dynamic-balance-in-sedentary-obese-young-adults-the-relationship-between-bmi-posture-and-postural-balance
#13
J A do Nascimento, C C Silva, H H Dos Santos, J J de Almeida Ferreira, P R de Andrade
The aim of this study was to evaluate the postural control of obese young adults with normal body mass index during different static (bipedic and unipedic support) and dynamic postural conditions (gait velocity and limits of stability) in order to compare the static and dynamic balance of these individuals. A cross-sectional quantitative study was carried out to evaluate static and dynamic balance in 25 sedentary individuals. The sample was divided into two groups, 10 in the normal-weight group (24.70 ± 3...
August 11, 2017: Clinical Obesity
https://www.readbyqxmd.com/read/28800501/learning-effects-of-dynamic-postural-control-by-auditory-biofeedback-versus-visual-biofeedback-training
#14
Naoya Hasegawa, Kenta Takeda, Moe Sakuma, Hiroki Mani, Hiroshi Maejima, Tadayoshi Asaka
Augmented sensory biofeedback (BF) for postural control is widely used to improve postural stability. However, the effective sensory information in BF systems of motor learning for postural control is still unknown. The purpose of this study was to investigate the learning effects of visual versus auditory BF training in dynamic postural control. Eighteen healthy young adults were randomly divided into two groups (visual BF and auditory BF). In test sessions, participants were asked to bring the real-time center of pressure (COP) in line with a hidden target by body sway in the sagittal plane...
August 2, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28800302/the-effect-of-pain-severity-on-postural-stability-and-dynamic-limits-of-stability-in-chronic-low-back-pain
#15
Elsadat Saad Soliman, Tamer Mohamed Shousha, Mohamed Salaheldien Alayat
BACKGROUND: Deficits of dynamic balance in chronic low back pain patients have been reported by different studies in terms of impaired postural control. However, they excluded the degree of pain as a determinant affecting dynamic balance. OBJECTIVE: To evaluate the effect of pain intensity on dynamic balance control in terms of postural stability indices (PSIs) and limits of stability (LOS) in chronic LBP patients. METHODS: Sixty subjects (38 men, 22 women) participated in the current study, 45 patients with chronic LBP were selected randomly and served as the chronic LBP group while 15 healthy subjects served as the asymptomatic group (AS)...
July 31, 2017: Journal of Back and Musculoskeletal Rehabilitation
https://www.readbyqxmd.com/read/28783618/performance-of-high-school-male-athletes-on-the-functional-movement-screen%C3%A2
#16
Laura J Smith, James R Creps, Ryan Bean, Becky Rodda, Bara Alsalaheen
OBJECTIVES: (1) Describe the performance of the Functional Movement Screen™ (FMS™) by reporting the proportion of adolescents with a score of ≤14 and the frequency of asymmetries in a cross-sectional sample; (2) explore associations between FMS™ to age and body mass, and explore the construct validity of the FMS™ against common postural stability measures; (3) examine the inter-rater and test-retest reliability of the FMS™ in adolescents. DESIGN: Cross-sectional...
September 2017: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28774686/does-stabilization-of-the-degenerative-lumbar-spine-itself-produce-multifidus-atrophy
#17
Young Eun Kim, Hae Won Choi
The effect of stabilization of the degenerative segment on changes in the pattern of paraspinal muscle activity was investigated using a previously developed musculoskeletal model. Muscle activity change depending on L4-L5 segment stabilization with and without taking into account the presence of multifidus atrophy according to direct invasion of the back muscle during surgery (MADIBM) was analysed in erect standing and 20° flexed postures. For the stabilization of the degenerative segment, a fusion or non-fusion stabilization with a pedicle-based dynamic stabilization system (PBDS) was applied...
July 31, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28767021/the-limits-of-stability-in-patients-with-unilateral-vestibulopathy
#18
Rafael Alvarez-Otero, Nicolas Perez-Fernandez
OBJECTIVE: To characterize the stability limits and region in patients with unilateral vestibulopathy according to the side of the lesion and determine if that imposes any bias. To analyze if the stability limits and region depend on the functional deficit as evaluated in the sensory organization test. METHODS: Forty patients with chronic dizziness and without any vertigo spell for least 6 months prior to testing. In all of them, a unilateral vestibulopathy was diagnosed clinically and at vestibular testing...
October 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28765993/effects-of-acute-peripheral-central-visual-field-loss-on-standing-balance
#19
Caitlin O'Connell, Arash Mahboobin, Scott Drexler, Mark S Redfern, Subashan Perera, Amy C Nau, Rakié Cham
Vision impairments such as age-related macular degeneration (AMD) and glaucoma are among the top risk factors for geriatric falls and falls-related injuries. AMD and glaucoma lead to loss of the central and peripheral visual fields, respectively. This study utilized a custom contact lens model to occlude the peripheral or central visual fields in healthy adults, offering a novel within-subject approach to improve our understanding of the etiology of balance impairments that may lead to an increased fall risk in patients with visual field loss...
August 1, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28764814/differences-of-muscle-co-contraction-of-the-ankle-joint-between-young-and-elderly-adults-during-dynamic-postural-control-at-different-speeds
#20
Yoshitaka Iwamoto, Makoto Takahashi, Koichi Shinkoda
BACKGROUND: Agonist and antagonist muscle co-contractions during motor tasks are greater in the elderly than in young adults. During normal walking, muscle co-contraction increases with gait speed in young adults, but not in elderly adults. However, no study has compared the effects of speed on muscle co-contraction of the ankle joint during dynamic postural control in young and elderly adults. We compared muscle co-contractions of the ankle joint between young and elderly subjects during a functional stability boundary test at different speeds...
August 2, 2017: Journal of Physiological Anthropology
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