The impact of vision loss on postural stability and balance strategies in individuals with profound vision loss

Ray, Christopher; Horvat, Michael; Croce, Ronald V.; Mason, Robert C.; Wolf, Steven L.

doi:10.1016/j.gaitpost.2007.09.010

Cited by 112 publications

(109 citation statements)

References 11 publications

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“…In the present study, changes in the visual condition affected more the COP mean velocity in the A/P direction than in the M/L, which is in accordance with Berencsi et al (2005), Jeka et al (2008), Ray et al (2008) and Sozzi et al (2011). Moreover, the Romberg Quotient of Vm (RQ V ) in the A/P direction does not statistically (p = 0.44) differ from that in the (x,y) plane (t-student, α = 0.05) and hence they provide similar information, as reported by Cornilleau-Pérès et al (2005).…”

Section: Discussionsupporting

confidence: 87%

“…The experimental protocol adopted in this study in which the subject is maintained in orthostatic position without any stimulus, is expected to cause small postural changes as a result of effective visual and proprioceptive feedbacks, as pointed out by Jeka et al (2004Jeka et al ( , 2008. Besides, in such kind of experiment, the EO condition improves the balance control (Ray et al, 2008;Sozzi et al, 2011), reducing the mean velocity (Vm) of the sway (Cornilleau-Pérès et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

“…According to Levi and Klein (2003) and to Maeda et al (1998), during visual feedback impairment, the sway in EO condition is higher for the lower RQ values, implying in a negative correlation (not observed in this work). Additionally, Ray et al (2008) reported that subjects with visual impairments present an inadequate postural control, increasing the sway when compared with a healthy population. Therefore, not all subjects with RQ V ≤ 100 can be considered as presenting impaired visual control (or postural blind) and, unlike pointed out by Gagey and Weber (2005), the RQ V can not be used alone as a normalcy index for the diagnosis of visual impairment sway control.…”

Section: Discussionmentioning

confidence: 99%

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Investigating the center of pressure velocity Romberg s quotient for assessing the visual role on the body sway

Silva

Nadal²,

Infantosi³

2012

RBEB

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The classical Romberg's test based on stabilometric tests in eyes open (EO) and closed (EC) conditions was used for investigating the influence of visual feedback in the body sway control in healthy adult subjects. Stabilograms from 144 subjects (aged 18-40) resting over a force platform were recorded for 30 s in EO and 30 s in EC conditions. The mean velocity was obtained for EO (Vm EO ) and EC (Vm EC ) in both anterior-posterior (y) and medial-lateral (x) directions and in the (x,y) plane, and thus used for computing the respective Romberg's quotient (RQ V ). All Vm and RQ V parameter histograms presented unimodal asymmetric shapes, which were adequately fitted to lognormal distributions (Kolmogorov-Smirnov test, p > 0.05). These findings suggest a single homogeneous group in terms of visual strategy. Taking the threshold scores (95% confidence interval) of the Vm and RQ V distributions, only four subjects (2.7%) presented values below the lower limit, as expected by the confidence level (two tailed, 5%). A strong dependence was also found between each RQ V and the respective Vm EC (Spear correlation ≥ 0.86, R 2 ≥ 74.0%), with Vm EO presenting almost negligible coefficients of determination (R 2 ≤ 2.9%). One can conclude that RQ V derived from a single stabilometric trial could be not sufficient for the diagnosis of body sway control impairment by vision. Nevertheless, the RQ V could be useful to indicate subjects to carry out additional tests to investigate a possible deficit in the integration of the visual information in the postural control system. Keywords Body sway control, Center of pressure velocity, Lognormal distribution, Romberg's test, Visual system. p > 0,05 Avaliando a importância da visão nas oscilações posturais utilizando o quociente de Romberg da velocidade do centro de pressão Resumo O Teste de Romberg clássico, baseado em testes estabilométricos nas condições de olhos abertos (EO) e fechados (EC), tem sido utilizado para investigar a influência da realimentação visual no controle das oscilações posturais em sujeitos adultos saudáveis. Estabilogramas de 144 sujeitos (18 a 40 anos) em posição ortostática sobre uma plataforma de força foram coletados durante 30 s na condição EO e 30 s em EC. As velocidades médias para EO (VmEO) e EC (VmEC), obtidas nas direções anteroposterior (y), mediolateral (x) e no plano (x,y), foram utilizadas no cálculo dos respectivos quocientes de Romberg (RQV). Os histogramas dos parâmetros Vm e RQV apresentaram morfologia unimodal assimétrica, aos quais foram ajustadas distribuições lognormais (Teste de

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Investigating the center of pressure velocity Romberg s quotient for assessing the visual role on the body sway

Silva

Nadal²,

Infantosi³

2012

RBEB

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“…Nessa condição os indivíduos são obrigados a responder a instabilidade oferecida pela superfície que se encontra instável, que segundo a literatura, aumenta a dificuldade da tarefa (RAY et al, 2008). Em vista disso, os resultados sugerem que o tratamento proposto pode ter estimulado o sistema proprioceptivo de maneira a facilitar os ajustes e a força muscular para adequar o controle postural à condição, como sugere Resende et al (2008).…”

Section: Resultsunclassified

Influência da hidrocinesioterapia no equilíbrio postural de idosas institucionalizadas

Meereis

Favretto

Souza

et al. 2013

Motriz: rev. educ. fis.

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IntroduçãoO controle do equilíbrio requer a manutenção do centro de gravidade sobre a base de sustentação durante situações estáticas e dinâmicas (DANIEL et al., 2010). Para o controle do equilíbrio corporal são necessárias contribuições dos sistemas visual, vestibular e proprioceptivo (BELLEW et al., 2009 Motriz, Rio Claro, v.19 n.2, p.269-277, abr./jun. 2013 Artigo Original Influência da hidrocinesioterapia no equilíbrio postural de idosas institucionalizadasEstele Caroline Welter Meereis Influence of hydrokinetic therapy in postural balance of institutionalized elderly peopleAbstract: The purpose of the present study was to evaluate the influence that a hydrokinetic therapy program in shallow water has on postural balance of institutionalized elderly women. In this study 8 institutionalized elderly, with a mean age of 62.95 ± 2.87 years participated. The postural balance was evaluated through the force platform. 3 attempts in each sensory organization test (SOT) previously and subsequently the intervention of hydrokinetic therapy in shallow water were made. The variables analyzed were: displacement amplitude of the pressure center (COP) in the anteroposterior, mediolateral direction and displacement speed of the COP. An improvement in postural control after the intervention was observed, where a decrease on the displacement of the pressure center happened, especially in the anteroposterior direction. For the group of institutionalized elderly participants in this study, hydrokinetic therapy performed in shallow water was able to improve postural balance.

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“…O comprometimento desse sistema pode reduzir a estabilidade, resultando em aumento da oscilação corporal e/ou alteração da estratégia de movimento (KARLSSON; FRYKBERG, 2000). Ray et al (2008) afirma que há acréscimo no risco de quedas em indivíduos com deficiência visual. Por conseguinte, Neves e Frasson (2003) afirmam ser factível a compreensão de que os déficits motores não sejam inerentes à condição de deficiente visual, e sim, muito provavelmente, em função da limitação de experiências motoras em diversos níveis.…”

Section: Discussionunclassified

Capoeira para deficientes visuais: comparação do equilíbrio entre praticantes e não praticantes de capoeira

Matos¹,

Menezes²

2012

Rev. Bras. Ciênc. Esporte

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The impact of vision loss on postural stability and balance strategies in individuals with profound vision loss

Cited by 112 publications

References 11 publications

Investigating the center of pressure velocity Romberg s quotient for assessing the visual role on the body sway

Investigating the center of pressure velocity Romberg s quotient for assessing the visual role on the body sway

Influência da hidrocinesioterapia no equilíbrio postural de idosas institucionalizadas

Capoeira para deficientes visuais: comparação do equilíbrio entre praticantes e não praticantes de capoeira

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