Subjective Visual Vertical Perception Relates to Balance in Acute Stroke

Bonan, Isabelle; Guettard, E.; Leman, M.C.; Colle, F.; Yelnik, A.

doi:10.1016/j.apmr.2006.01.019

Cited by 77 publications

(70 citation statements)

References 28 publications

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“…Certain diseases may alter the perception of the vertical, in the frontal and/or the sagittal plane. In the frontal plane, a tilted perception of the vertical and/or an uncertainty in the perception of the vertical is frequently observed in patients with a hemisphere stroke (Bonan et al 2006;Brandt et al 1994;Perennou et al 1998;Perennou et al 2000;Perennou et al 2008;Saj et al 2005;Yelnik et al 2002), or a peripheral or central vestibular disease (Aoki et al 1999;Bisdorff et al 1996;Bronstein et al 2003;Dieterich and Brandt 1992). In the sagittal plane, a tilted perception of the vertical has recently been found in elderly fallers (Manckoundia et al 2007).…”

Section: Introductionmentioning

confidence: 96%

Ageing of the postural vertical

Barbieri

Gissot

Pérennou

2009

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A postural vertical (PV) tilted backward has been put forward as a reason explaining the backward disequilibrium often observed in elderly fallers. This raises the question of a possible ageing process of the PV involving a backward tilt of verticality perception increasing with age. We have explored this hypothesis by measuring PV in pitch using the wheel paradigm in 87 healthy subjects aged from 20 to 97 years. The possibility that this physiological ageing accelerated in the second part of life was also analysed. Two indices were calculated: the mean orientation (PV-orient) and the dispersion (PV-uncert). The correlation between age and PV-orient was r = -0.2 (p < 0.05). Added to the fact that PV was twice as shifted backward in the 38 seniors over 50 years (-1.15 degrees +/- 1.40 degrees ) as in the 49 young adults under 50 years (-0.45 degrees +/- 0.97 degrees ; t = 2.75, p < 0.01), this indicates the existence of a physiological ageing process on the direction perceived as vertical by the whole body, with a slight backward shift of PV throughout the life span. The correlation between age and PV-uncert was r = 0.35 (p < 0.001) in all subjects and r = 0.59 (p < 0.001) in seniors. This indicates that subjects get less and less accurate in their perception of the postural vertical with age, especially very old subjects who show great uncertainty in determining with their body the direction of the vertical. Taken together, these findings indicate that the internal model of verticality is less robust in elderly people. This may play a part in their postural decline.

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Section: Introductionmentioning

confidence: 96%

Ageing of the postural vertical

Barbieri

Gissot

Pérennou

2009

AGE

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“…In many studies addressing stroke patients the most commonly used assessments are the subjective visual vertical test (SVV) and the subjective postural vertical test (SPV) (Bonan et al 2006a(Bonan et al , b, 2007Saj et al 2005;Yelnik et al 2002;Lafosse et al 2004). However, when applying SVV and SPV, the occurring biases must be kept in mind.…”

Section: Introductionmentioning

confidence: 99%

Suppression of the E-effect during the subjective visual and postural vertical test in healthy subjects

et al. 2010

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In this study the influence of head-on-body and starting roll position of laser bar and chair was investigated on the perception of, respectively, the visual and postural vertical. Sixty-one subjects, between 21 and 82 years, participated in this study. Results show that head-on-body and starting roll position of laser bar or chair have an influence on the outcome for both subjective visual vertical test (SVV) and subjective postural vertical test (SPV). When head-on-body and starting roll positions are combined the E-effect (deviation of the SVV-SPV opposite to the head-on-body tilt, when the roll tilt of the head is <60 degrees -70 degrees ) is observed in the anti-parallel condition, but is suppressed when starting roll position of laser bar or chair are relatively parallel to the length axis of the tilted head. It is suggested that in the assessment of the SVV, when the laser bar is aligned with the length axis of the head (parallel condition), the oblique effect occurs. In the assessment of the SPV, the E-effect is also suppressed in the parallel condition. It is hypothesized that in the parallel conditions, the gravitational reference frames of head and trunk are more aligned with each other providing similar information. In the anti-parallel conditions the reference frames of head and trunk are malaligned, providing contrary input making the estimation of the earth vertical more difficult. It seems that SVV and SPV measurements are influenced by head-on-body and starting roll positions and has to be taken into account in further studies.

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“…Perception of visual verticality is independent of postural verticality. Postural perception of verticality has multiple neural representations [44] and may be abnormal in patients with stroke, particularly in the presence of visuospatial neglect [45][46].…”

Section: Perception Of Verticalitymentioning

confidence: 99%

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Oliveira¹,

Medeiros²,

Frota³

et al. 2008

JRRD

185

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Abstract-Balance problems in hemiparetic patients after stroke can be caused by different impairments in the physiological systems involved in postural control, including sensory afferents, movement strategies, biomechanical constraints, cognitive processing, and perception of verticality. Balance impairments and disabilities must be appropriately addressed. This article reviews the most common balance abnormalities in hemiparetic patients with stroke and the main tools used to diagnose them.

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Subjective Visual Vertical Perception Relates to Balance in Acute Stroke

Cited by 77 publications

References 28 publications

Ageing of the postural vertical

Ageing of the postural vertical

Suppression of the E-effect during the subjective visual and postural vertical test in healthy subjects

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