Low vision affects dynamic stability of gait

Hallemans, Ann; Ortibus, Els; Meire, FranÃ§oise; Aerts, Peter

doi:10.1016/j.gaitpost.2010.07.018

Cited by 164 publications

(133 citation statements)

References 14 publications

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“…While walking, the visual system provides important information on the surroundings and contributes to route planning and maintaining body stability [19,20]. The availability of visual information on the location of an obstruction significantly affects how a pedestrian deals with the obstruction.…”

Section: Introductionmentioning

confidence: 99%

Effects of mobile texting and gaming on gait with obstructions under different illumination levels

Cha

Kim

Park

et al. 2015

PTRS

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Objective: This study was conducted to test the effects of mobile texting and gaming on gait with obstructions under different illumination levels. Design: Cross-sectional study. Methods: Twelve healthy adults aged 20 to 36 years (mean 23.5 years) were tested under six different conditions. All participants used touchscreen smartphones. Testing conditions included: 1) Walking with an obstruction under a bright illumination level; 2) walking with an obstruction with a low level of illumination; 3) walking with an obstruction while texting under a bright illumination level; 4) walking with an obstruction while texting with a low level of illumination; 5) walking with an obstruction while gaming under a bright illumination level; and 6) walking with an obstruction while gaming with a low level of illumination. All participants were asked to text the Korean national anthem by their own phone and play Temple Run 2 using an iPhone 5. Gait variances were measured over a distance of 3 m, and the mean value after three trials was used. A gait analyzer was used to measure the data. Results: Compared to normal gait with obstruction, gait speed, step length, stride length, step time, stride time, cadence while texting and gaming showed significant differences (p<0.05). Differences between the illumination levels included gait speed, step length, stride length, and step time (p<0.05) with no significant differences in stride time and cadence. Conclusions: Dual-tasking using a smartphone under low levels of illumination lowers the quality of gait with obstructions.

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Section: Introductionmentioning

confidence: 99%

Effects of mobile texting and gaming on gait with obstructions under different illumination levels

Cha

Kim

Park

et al. 2015

PTRS

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“…The lack of differences in walking stability may be explained by the maintenance of gait velocity. This is probably the most significant result of the study, since total visual deprivation reduces self-selected gait velocity 10,12,13 and the occlusion of peripheral vision leads to a decrease in walking speed 22 and an increase in the risk of falls 23 . This fact indicates that a partial reduction in lighting in subjects with good visual acuity may not be sufficient to reduce gait velocity.…”

Section: Discussionmentioning

confidence: 98%

“…The visual system plays a key role in the control of this stability during walking, contributing to the orientation of locomotion and route planning 9 . In adults, visual deprivation during walking induces negative changes in the spatiotemporal patterns of gait, such as a reduction in walking speed and step length and an increase in double support duration [10][11][12] . The same gait adaptations are observed in children walking in the dark 13 , in subjects walking in a virtual reality environment which induces conflicts to the visual system 14,15 , and in subjects with visual problems 12,16,17 .…”

Section: Introductionmentioning

confidence: 99%

“…In adults, visual deprivation during walking induces negative changes in the spatiotemporal patterns of gait, such as a reduction in walking speed and step length and an increase in double support duration [10][11][12] . The same gait adaptations are observed in children walking in the dark 13 , in subjects walking in a virtual reality environment which induces conflicts to the visual system 14,15 , and in subjects with visual problems 12,16,17 . Apparently, these patterns are adopted as a strategy to keep the COM close to the BOS, maintaining a careful gait as seen when walking in situations with an increased risk of slipping 7 or in elderly populations with a history of falls 18,19 .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Estabilidade da marcha de adultos em diferentes condições visuais: estudo piloto

Silveira

Lemos

Pranke

et al. 2014

Rev. Bras. Cineantropom. Desempenho Hum.

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-The visual system is fundamental for the control of gait stability. Visual deprivation or impairment can deteriorate walking stability in adults; however, in daily life, adults are exposed to different light intensities rather than visual deprivation. The objective of this study was to investigate gait stability in young adults exposed to different visual conditions. Ten adults without visual problems participated in the study. The subjects walked at two speeds (self-selected and 30% faster) under four visual conditions: normal vision and using three different masks covered with automotive film to reduce the passage of light to the eye (50% > 20% > 5% -lowest light passage). Stability parameters (margin of stability -MOS, center of mass separation -COM SEP , and time-to-contactTtC) obtained by analysis of the COM displacement relative to the base of support, and spatiotemporal parameters (step length, gait velocity, and support time) were assessed. The different visual conditions did not affect gait stability or spatiotemporal parameters at the two walking speeds studied. The variations in stability between visual conditions relative to normal vision were not expressive for MOS (< 4%), COM SEP (< 7%), or TtC (< 6%) at the two walking speeds. This lack of changes in stability may have been due to maintenance of the spatiotemporal characteristics because of the strong association between these characteristics. The adults studied can control stability without changing their gait patterns under different visual conditions, and lower light intensities do not increase the risk of falls. Key words: Postural balance; Vision; Walking. Resumo -O sistema visual é fundamental no controle estável da marcha. A privação ou perturbação da visão pode deteriorar a estabilidade da caminhada em adultos, porém, diariamente, eles estão submetidos a diferentes luminosidades e não nas situações desafiadoras citadas. O objetivo do estudo foi investigar a estabilidade da marcha de adultos em diferentes condições visuais. Dez adultos sem problemas visuais participaram do estudo. Os sujeitos caminharam em duas velocidades (autosselecionada e 30% mais rápida) e quatro condições visuais: visão normal e usando três diferentes máscaras envolvidas por película automotiva, permitindo passagem de níveis reduzidos de luz até o olho (50% > 20% > 5% -menor passagem de luz). Os parâmetros de estabilidade (margem de estabilidade -MOS

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“…The visual system provides information not only on target distance and presence of obstacles, but also on maintaining balance during walking (Hallemans et al, 2010) adjusting trajectories when an obstacle appears or the target is shifted (Reynolds and Day, 2005).…”

Section: Introductionmentioning

confidence: 99%