Effects of Age-Related Macular Degeneration on Postural Sway

Chatard, Hortense; Tepenier, Laure; Jankowski, Olivier; Aussems, Antoine; Allieta, Alain; Beydoun, Talal; Salah, S. Ben; Bucci, Maria Pia

doi:10.3389/fnhum.2017.00158

Cited by 19 publications

(11 citation statements)

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“…Indeed, reports indicate that sensory inputs such as visual, proprioceptive, and vestibular cues are essential to maintaining normal postural control (32). Several studies have shown that postural control changes in tests with subjects who have impaired vision (12, 33, 34), or who have vestibular deficits (22, 35). In our study, we included patients who only have visual deficits (Usher type II), and patients who have both visual and vestibular deficits (Usher type I).…”

Section: Discussionmentioning

confidence: 99%

“…They found that AMD patients were more unstable than the controls in both postural conditions (with or without foam pads), suggesting that elderly subjects may not be able to reweight different sensory inputs to maintain their stability. More recently, Chatard et al (12) studied the impact of AMD on postural sway and observed that AMD subjects were more unstable than controls, again interpreted as being most likely due to the absence of postural adaptive mechanisms which could compensate for their visual deficits.…”

Section: Introductionmentioning

confidence: 99%

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Postural Instability in Subjects With Usher Syndrome

et al. 2019

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This study investigated postural performances and vestibular impairment in Usher patients. The three groups studied were: 11 patients with Usher type I (with visual and vestibular impairment), 14 patients with Usher type II (with only visual impairment), and 14 healthy control subjects. Postural stability was measured with a Framiral Multitest Equilibre platform with three visual conditions: eyes open (EO), eyes closed (EC), and vision disturbed by optokinetic stimulation (OPT), and two different postural conditions: stable or unstable platform. The surface and mean velocity of the center of pressure displacement (CoP) were measured and a postural instability index (PII) was calculated. Usher type I and II patients were more unstable than control subjects, but only for the unstable platform. Patients with Usher type I (with severe vestibular impairment) were also significantly more unstable than patients with Usher type II (with normal vestibular function) on the unstable platform. The severity of the vestibular impairment was correlated with the surface of the CoP displacement. We suggest that poor postural control of Usher patients is due to the abnormalities in their visual and, when defective, vestibular inputs. Measurements of postural stability on an unstable platform can distinguish type I from type II Usher patients. We emphasize the importance of multisensory evaluation in these patients to guide development of personalized visuo-vestibular rehabilitation techniques to improve their postural stability and improve their quality of life.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Postural Instability in Subjects With Usher Syndrome

et al. 2019

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“…Chatard et al, studying 10 elderly unilateral AMD subjects, 10 elderly bilateral AMD subjects, and 10 healthy age-matched control subjects, showed that bilateral AMD subjects had a surface area and an antero-posterior displacement of the CoP higher than healthy elderly. Unilateral AMD subjects had more antero-posterior displacement of the CoP than healthy elderly [19]. The authors conclude that because of aging, AMD subjects could have poor postural adaptive mechanisms which increase instability and risk of falls.…”

Section: Age-related Macular Degenerationmentioning

confidence: 84%

Postural Imbalance in the Elderly: Main Aspects

Pereira¹,

Scheicher²

2019

Geriatric Medicine and Gerontology

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The aging of the population is an unprecedented world phenomenon. Numerous physiological changes occur with aging, and one of the most common situations is postural imbalance and, consequently, the occurrence of falls. Balancing is the process of controlling the body's center of mass with respect to its base of support and depends on the integration of sensory systems (visual, vestibular, and somatosensory) with the central nervous system (CNS). Each system is prone to deterioration with advancing age and is influenced by age-related diseases and use of some types of medications and polypharmacy. As with any good clinical evaluation, a detailed history and a thorough physical examination are essential to evaluate postural balance. The evaluation of balance must be done with tests that are quick and with relatively little equipment and training. The improvement of postural balance can be done in many ways, and exercises are a type of this treatment and can be done with video games or a treadmill, for example.

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“…Our findings were in line with the literature 39 or from previous findings from our group 33 . Several studies showed that the presence of a visual disorders as well as strabismus 40,41 or age-related macular degeneration 42 could affect postural stability. These studies confirmed the importance of visual inputs for reaching body stability.…”

Section: Discussionmentioning

confidence: 99%

Short rehabilitation training program may improve postural control in children with autism spectrum disorders: preliminary evidences

Caldani

Atzori

Peyre

et al. 2020

Sci Rep

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Autism Spectrum Disorders subjects (ASD) is characterized by postural control deficits. This study aimed to explore the effect of a short postural rehabilitation training program on postural capabilities in children with ASD. Two groups (G1 and G2) of twenty children with ASD of IQ-, sex-and age-matched (mean age 11.7 ± 2.4 years) were included in this study. Posture was recorded by using the Balance Quest from Framiral on unstable platform in three different viewing conditions. The rehabilitation program consisted in two distinct postural control training exercises. Postural recordings were performed twice at T1 and T2 for both groups of children. Between T1 and T2 a 6-minute postural training was performed by the G1 group only, while the G2 group had a 6-minute of rest. Children were allocated randomly to the G1 or G2 groups. At T1, postural instability was similar for both groups of ASD children (G1 and G2) desp+\ite viewing conditions. At T2, we observed an improvement of postural control related to a mixed effect of training rehabilitation but also of test-retest. Knowing the potential of new rehabilitation strategies, the impact of postural control deficit in ASD children needs to be reconsidered. Well design case-control studies are requested to ensure scientific validity of postural rehabilitation training program. Autism Spectrum Disorders (ASD) are neurodevelopmental disorders characterized by social communication and social interaction deficits, associated with the presence of restricted, repetitive and stereotyped behaviors 1. Sensorimotor deficits as well as fine and gross motor skill impairment are consistently reported in children with ASD and correlated with the severity of social communication impairment 2,3. Sensory abnormalities are frequently the earliest identifiable clinical features of developmental trajectory impairments 4,5. Similarly to social communication deficit, motor impairments may represent core features of autism when considering a broader spectrum of symptom 6. Several groups measured postural sway in children with ASD and showed that affected children were significantly more unstable than children with neurotypical development 7,8. A larger surface area of the center of pressure (COP) was observed in children with ASD with respect to control participants 9-13 , associated with an increased COP velocity 10,11,14. Postural instability in children with ASD was also more significant when somatosensory inputs were affected, such as standing on an unstable platform with foams under the feet or when wearing a vibrating apparatus on the neck 7,13,15-18. All of these studies reported a significantly larger body sway displacement and/or faster sway velocity in subjects with ASD compared to peers with typical neurodevelopment. It was most likely due to a reduced

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Effects of Age-Related Macular Degeneration on Postural Sway

Cited by 19 publications

References 50 publications

Postural Instability in Subjects With Usher Syndrome

Postural Instability in Subjects With Usher Syndrome

Postural Imbalance in the Elderly: Main Aspects

Short rehabilitation training program may improve postural control in children with autism spectrum disorders: preliminary evidences

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