Effects of seated whole-body vibration on postural control of the trunk during unstable seated balance

Slota, Gregory P.; Granata, Kevin P.; Madigan, Michael L.

doi:10.1016/j.clinbiomech.2007.11.006

Cited by 53 publications

(47 citation statements)

References 30 publications

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“…However, the mass of the lower limbs was still acting forward and would modify the postural adjustments. Certain studies, to limit the effect of the lower limb, proposed different solutions to link lower limb to the seesaw [11,20,31]. In these configurations, the lower limbs followed the plateau displacement.…”

Section: Discussionmentioning

confidence: 99%

Idiopathic scoliosis: relations between the Cobb angle and the dynamical strategies when sitting on a seesaw

Bruyneel¹,

Chavet²,

Ebermeyer³

et al. 2010

Eur Spine J

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The aim of this study was to determine the influence of the severity of the spinal curve on the postural regulation when self-imposed disturbances occur in a seated position in anteroposterior (AP) and mediolateral (ML) orientations. Twelve female adolescents with a right thoracic scoliosis (Cobb = 30.4°± 9.7) were included in this study. The ground reaction forces (GRF) were studied while the subjects were maintaining their sitting on a seesaw (ML or AP destabilisation). Five conditions were tested: eyes open; with additional loads placed onto the subject's right or left shoulder; or onto the subject's right or left pelvis. We tested the correlation between the Cobb angle and the postural parameters (index of performance and GRF variability) for each condition. When the destabilisation was AP, the Cobb angle was significantly correlated with GRF variability and anterior and concavity index of performance. Two conditions showed higher correlations: stabilisation with the concavity pelvis load (GRF variability) and the open eyes (index of performance). In contrast, whatever the condition tested was, no link was found when the destabilisations were applied in ML direction. The destabilisation in a seated position highlights the influence of the curve severity on the postural organisation. In seated position, the postural control strategies specific to the scoliotic patients were always correlated by severity of curve, especially when the destabilisation is applied in AP directions. This study showed that the unstable seating position can be considered as a pertinent paradigm to help finding a postural clinical index for adolescent idiopathic scoliosis.

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Section: Discussionmentioning

confidence: 99%

Idiopathic scoliosis: relations between the Cobb angle and the dynamical strategies when sitting on a seesaw

Bruyneel¹,

Chavet²,

Ebermeyer³

et al. 2010

Eur Spine J

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“…z Uniwersytetu Wirginia na podstawie badań przeprowadzonych na 21 ochotnikach stwierdzili, że WBV zaburza kontrolę posturalną podczas niestabilnej pozycji siedzącej [25]. Rees i wsp.…”

Section: Whole Body Vibration Massage (Wbv)unclassified

“…Slota et al from the University of Virginia on the basis of their research carried out in a group of 21 volunteers concluded that WBV disturbed postural control in instable sitting position [25]. Rees et al from Sydney examined the effects of systemic vibrations on postural stability in a group of 43 elderly people, 23 men and 20 women, aged 73.5 ± 4.5 years.…”

Section: Wnioskimentioning

confidence: 99%

Vibratory massage for complementing training in sports and physiotherapy

Opara¹,

Mehlich²,

Gieremek³

et al. 2010

Physiotherapy

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WprowadzenieMasaż wibracyjny wywiera wpływ na rodzaj czucia głębo-kiego, zwany propriocepcją. Propriocepcję defi niuje się jako wyspecjalizowaną funkcję czuciową obejmującą zmysł orientacji ułożenia części własnego ciała, ich ruchu (kinestezja) i czucie wibracji. Receptory zapewniające propriocepcję -mechanoreceptory -ulokowane są w mięśniach i ścięg-nach. Dostarczają one także mózgowi informacji o tonusie mięśniowym. Za czucie wibracji odpowiadają duże, kuliste ciałka Vatera-Paciniego, obecne głównie w głębokich warstwach skóry, w ścięgnach, torebkach stawowych i okostnej. Włókno nerwowe otoczone jest wielowarstwowym, koncentrycznym układem spłaszczonych komórek Schwanna, pomiędzy którymi znajduje się płyn tkankowy [1,2]. Masaż wibracyjny ręcznyMasaż ręczny znany jest od tysięcy lat. Jednym z istotnych elementów masażu klasycznego jest technika wibracyjna [3]. Masażysta wykonuje ruchy "trzęsące" ręką powodując wibrację tkanki podskórnej. Najczęściej celem tego typu masażu jest zmniejszenie obrzęku tkanki. Działanie techniki wibracyjnej jest podobne do wpływu innego elementu składowego masażu -oklepywania. Wibracja ręczna stosowana jest też w celu drenażu drzewa oskrzelowego IntroductionVibratory massage affects deep sensibility called proprioception. Proprioception is defi ned as a specialised sensibility function covering the sense of the relative position of neighbouring parts of the body, their movement (kinesthesia) and sensing vibration. The receptors providing proprioception -mechanoreceptors -are located in muscles and tendons. They supply the brain with all the information about muscular tonus. Large, spherical Vater-Pacini corpuscles are responsible for vibration sensibility and they are present in deep skin layers, tendons, articular capsules and periosteum. Nervous fi bres are surrounded by multilayer, concentric system of Schwann cells between which tissular liquid is be found [1,2]. Manual vibratory massageManual massage has been known for thousands of years. One of important elements of classical massage is gentle vibration [3]. A massage therapist performs on the skin's surface rapid tapping movements with his/her hand causing vibration in subcutaneous tissues. The vibration technique's effects are similar to another element of massage -percussing. Manual vibration is also used for drainage of the bronchial tree in people with Słowa kluczowe: fi zjoterapia, masaż wibracyjny, trening, rehabilitacja, sport. Masaż wibracyjny dla wspomagania treningu sportowego i fi zjoterapii Abstract:Recently many new devices used for vibratory massage have become available on the Polish market. Manuals usually lack information concerning frequency and intensity of the vibration to be used. Scientifi c papers on application and effects of vibratory massage are hard to fi nd in Polish references. The authors of this paper gathered the available reports on using vibratory massage in sports, biological renewal and physiotherapy.

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“…The purpose of this controller is to slow the unstable poles of the closed-loop system enough for the system to be stabilizable by a human subject. Other studies of unstable seated balance commonly employ similar techniques, such as adding physical springs [14,15] or having the seat balance on a hemisphere instead of a point [1]. The backdrivable robot can additionally apply a torque disturbance u to the seat that can be used as an excitation signal for system identification [16].…”

Section: Experimental Modelingmentioning

confidence: 99%

Time-Domain Optimal Experimental Design in Human Seated Postural Control Testing

Priess

Choi

Radcliffe

et al. 2015

Journal of Dynamic Systems, Measurement, and Control

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We are developing a series of systems science-based clinical tools that will assist in modeling, diagnosing, and quantifying postural control deficits in human subjects. In line with this goal, we have designed and constructed a seated balance device and associated experimental task for identification of the human seated postural control system. In this work, we present a quadratic programming (QP) technique for optimizing a time-domain experimental input signal for this device. The goal of this optimization is to maximize the information present in the experiment, and therefore its ability to produce accurate estimates of several desired seated postural control parameters. To achieve this, we formulate the problem as a nonconvex QP and attempt to locally maximize a measure (T-optimality condition) of the experiment's Fisher information matrix (FIM) under several constraints. These constraints include limits on the input amplitude, physiological output magnitude, subject control amplitude, and input signal autocorrelation. Because the autocorrelation constraint takes the form of a quadratic constraint (QC), we replace it with a conservative linear relaxation about a nominal point, which is iteratively updated during the course of optimization. We show that this iterative descent algorithm generates a convergent suboptimal solution that guarantees monotonic nonincreasing of the cost function value while satisfying all constraints during iterations. Finally, we present successful experimental results using an optimized input sequence.

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Effects of seated whole-body vibration on postural control of the trunk during unstable seated balance

Cited by 53 publications

References 30 publications

Idiopathic scoliosis: relations between the Cobb angle and the dynamical strategies when sitting on a seesaw

Idiopathic scoliosis: relations between the Cobb angle and the dynamical strategies when sitting on a seesaw

Vibratory massage for complementing training in sports and physiotherapy

Time-Domain Optimal Experimental Design in Human Seated Postural Control Testing

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