Postural control of the trunk in response to lateral support surface translations during trunk movement and loading

2001 ◽  
Vol 141 (4) ◽  
pp. 552-559 ◽  
Author(s):  
Huang Q.-M. ◽  
Hodges P. ◽  
Thorstensson A.
Keyword(s):  
Postural Control ◽  
Support Surface ◽  
Trunk Movement

Experience on an Elevated Inclined Surface and Postural Control

2005 ◽  
Vol 49 (14) ◽  
pp. 1311-1314
Author(s):  
Chip Wade ◽  
Jerry Davis
Keyword(s):  
College Students ◽  
Postural Control ◽  
Postural Stability ◽  
Support Surface ◽  
Motion Analysis System ◽  
Balance Test ◽  
Significant Decrement ◽  
Peripheral Area ◽  
Analysis System ◽  
Inclined Surface

Historically, roofing work has been ranked among the highest of all industries with incidents of fatal and non-fatal falls. The purpose of this study was to investigate the exposure to an elevated inclined surface on postural stability. Twenty males, 10 experienced roofers, and 10 inexperienced college students participated in this study, which consisted of a preliminary balance test, followed by exposure to an elevated inclined surface for ten-minutes of exposure. While subjects walked, a motion analysis system recorded their position on the elevated roofing surface to determine the amount of time a subject spent in each of two areas, central or peripheral. Results suggest that both experienced and inexperienced individuals demonstrated decreased postural stability following exposure to the elevated inclined surface, with experienced individuals demonstrating a lesser decrement. Furthermore, experienced individuals spent a significantly greater portion of time in the peripheral area (extremities of the elevated roofing surface) surface compared to inexperienced individuals. These findings suggest that there is a significant decrement in postural stability due to exposure to an elevated inclined support surface.

scholarly journals Temporal Structure of Support Surface Translations Drive the Temporal Structure of Postural Control During Standing

2015 ◽  
Vol 43 (11) ◽  
pp. 2699-2707 ◽  
Author(s):  
Troy J. Rand ◽  
Sara A. Myers ◽  
Anastasia Kyvelidou ◽  
Mukul Mukherjee
Keyword(s):  
Postural Control ◽  
Temporal Structure ◽  
Support Surface

scholarly journals Dissociating proprioceptive deficits in Autism Spectrum Disorders: Intact acuity but impaired sensory integration in postural control

2019 ◽  
Author(s):  
Michail Doumas ◽  
Rebekah Knox ◽  
Cara O’Brien ◽  
Chesney E. Craig
Keyword(s):  
Postural Control ◽  
Sensory Integration ◽  
Autism Spectrum ◽  
Sensory Profile ◽  
Group Differences ◽  
Body Sway ◽  
Support Surface ◽  
Proprioceptive Information ◽  
Baseline Phase ◽  
Adults With Asd

AbstractWe investigated the presence of proprioceptive deficits in adults with Autism Spectrum Disorder (ASD), by assessing peripheral proprioceptive information (or proprioceptive acuity) as well as integration of proprioceptive information in the context of postural control. We hypothesized that proprioceptive acuity would be intact but that integration during a postural control task would be impaired. Sixteen adults with ASD and sixteen Neurotypical (NT) adults were screened using an IQ test and the adolescent-adult sensory profile. Proprioceptive acuity was assessed using an ankle Joint Position Sense (JPS) task and integration of proprioceptive information was assessed using a postural adaptation task. This task comprised standing upright, without vision in three phases: standing on a fixed surface for 2 minutes (baseline), followed by standing on a surface tilting in proportion to participants’ body sway, or support-surface sway reference for 3 minutes (adaptation) and finally standing on the restored fixed surface for 3 minutes (reintegration). Results showed no group differences in proprioceptive acuity and in the baseline phase, but greater postural sway during adaptation in individuals with ASD compared with NT controls. Specifically, group differences were not present in the first 30s of adaptation, but emerged after the second window suggesting a deficit in sensory integration of proprioception in adults with ASD. Our results suggest that peripheral proprioceptive information is intact in ASD but neural sensory integration of proprioception is impaired in this group.

scholarly journals Haptic contact with a walking dog improves human balance during a quiet tandem task with various levels of difficulty

2021 ◽  
Vol 15 (3) ◽  
pp. 237-249
Author(s):  
Eliane Mauerberg-deCastro ◽  
Gabriella A. Figueiredo ◽  
Thayna P. Iasi ◽  
Debra F. Campbell ◽  
Renato Moraes
Keyword(s):  
Postural Control ◽  
Task Difficulty ◽  
Force Platform ◽  
Support Surface ◽  
Haptic Information ◽  
Dog Walking ◽  
Eyes Closed ◽  
Pulling Forces ◽  
Eyes Open ◽  
Human Balance

BACKGROUND: When a person walks a dog, information from variables of their own postural control is integrated with haptic information from the dog’s movements (e.g., direction, speed of movement, pulling forces). AIM: We examined how haptic information provided through contact with a moving endpoint (here, the leash of a dog walking on a treadmill) influenced an individual’s postural control during a quiet tandem standing task with and without restricted vision and under various elevations of the support surface (increased task difficulty levels). METHOD: Adults performed a 30-second quiet tandem stance task on a force platform while holding a leash attached to a dog who walked on a treadmill parallel to the force platform. Conditions included: haptic contact (dog and no-dog), vision constraint (eyes open, EO, and eyes closed, EC), and surfaces (4 heights). RESULTS: Interaction between haptic condition and vision showed that contact with the dog leash reduced root mean square (RMS) and mean sway speed (MSS). RMS showed that the highest surface had the greatest rate of sway reduction during haptic contact with EC, and an increase with EO. CONCLUSION: The dog’s movements were used as a haptic reference to aid balance when eyes were closed. In this condition, contact with the dog’s leash reduced the extent of sway variability on the higher surfaces.

scholarly journals Postural control of a musculoskeletal model against multidirectional support surface translations

PLoS ONE ◽  
2019 ◽  
Vol 14 (3) ◽  
pp. e0212613 ◽  
Author(s):  
Kohei Kaminishi ◽  
Ping Jiang ◽  
Ryosuke Chiba ◽  
Kaoru Takakusaki ◽  
Jun Ota
Keyword(s):  
Postural Control ◽  
Musculoskeletal Model ◽  
Support Surface

Effect of Head Orientation on Human Postural Stability Following Unilateral Vestibular Ablation

1991 ◽  
Vol 1 (2) ◽  
pp. 153-160
Author(s):  
Charles R. Fox ◽  
Gary D. Paige
Keyword(s):  
Postural Control ◽  
Postural Stability ◽  
Postural Sway ◽  
Normal Subjects ◽  
Head Orientation ◽  
Support Surface ◽  
Eyes Closed ◽  
Vestibular Information ◽  
Postural Equilibrium ◽  
Vestibular Pathology

Effective interpretation of vestibular inputs to postural control requires that orientation of head on body is known. Postural stability might deteriorate when vestibular information and neck information are not properly coupled, as might occur with vestibular pathology. Postural sway was assessed in unilateral vestibulopathic patients before and acutely, 1,4, and 18+ months after unilateral vestibular ablation (UVA) as well as in normal subjects. Postural equilibrium with eyes closed was quantified as scaled pk-pk sway during 20 s trials in which the support surface was modulated proportionally with sway. Subjects were tested with the head upright and facing forward, turned 45∘ right, and 45∘ left. Equilibrium was uninfluenced by head orientation in normal subjects. In contrast, patients after UV A showed both a general reduction in stability and a right/left head orientation-dependent asymmetry. These abnormalities adaptively recovered with time. It is concluded that vestibular inputs to postural control are interpreted within a sensory-motor context of head-on-body orientation.

Recovery of Postural Control After an Acute Unilateral Vestibular Lesion in Humans

1991 ◽  
Vol 1 (4) ◽  
pp. 373-383
Author(s):  
Michael Fetter ◽  
Hans-Christoph Diener ◽  
Johannes Dichgans
Keyword(s):  
Postural Control ◽  
Acute Phase ◽  
Time Course ◽  
Sensory Input ◽  
Characteristic Pattern ◽  
Support Surface ◽  
Upright Stance ◽  
Spinal Balance ◽  
Vestibular Lesion ◽  
Postural Responses

Postural control during stance was investigated using the EQUITEST® system in 10 patients during recovery after an acute unilateral vestibular lesion and was compared to the time course of recovery of the static and dynamic vestibulo-ocular imbalance. During the acute phase the patients showed a characteristic pattern with normal upright stance as long as at least one accurate sensory input (visual or somatosensory) was provided and severe postural disturbances when they had to rely primarily on vestibular afferences. Both static vestibulo-ocular and vestibulo-spinal balance recovered very fast, showing basically normal results on postural testing within about 2 weeks after the lesion. Thereafter, no pathological pattern was detectable during postural testing even in patients with persistent complete unilateral vestibular lesions. Reflexive postural responses to unexpected rapid displacements of the support surface seemed not to be influenced by vestibular imbalance even in the acute phase of the lesion.

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