Body Sway Characteristics during Static Upright Posture in Healthy and Disordered Elderly

Demura, Shinichi; Kitabayashi, Tamotsu; Kimura, Akimitsu; Matsuzawa, Jinzaburo

doi:10.2114/jpa.24.551

Cited by 15 publications

(14 citation statements)

References 14 publications

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“…This raises the hypothesis that neuropathological changes that negatively affect postural control and increase the risk of falls may happen subclinically in AD patients [32,39,40]. In fact, in our study, ADF and ADNF patients, although having different kinetic performances, were clinically very similar, not differing in age, anthropometric data, neuropsychological assessment, or severity of the disease.…”

Section: Discussionsupporting

confidence: 50%

Postural Stability Analysis with Inertial Measurement Units in Alzheimer's Disease

Gago¹,

Basto‐Fernandes

Ferreira

et al. 2014

Dement Geriatr Cogn Disord Extra

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Background: The cause of frequent falls in patients with Alzheimer's disease (AD) is still not well understood. Nevertheless, balance control and sensory organization are known to be critical for moving safely and adapting to the environment. Methods: We evaluated postural stability in 20 AD patients (11 fallers and 9 nonfallers) and 16 healthy controls with an inertial measurement unit (triaxial accelerometers and gyroscopes) attached to the center of mass (COM) in different balance conditions (Romberg on flat surface and frontward/backward-inclined surface, with or without visual suppression) in a motor lab. Results: In AD patients, the group of fallers showed a different kinetic pattern of postural stability characterized by higher vulnerability to visual suppression, higher total/maximal displacement and a mediolateral/anteroposterior range of sway, and a consequent need for more corrections of COM pitch and roll angles. Conclusion: Further studies are needed to consolidate the normative values of the discriminatory kinetic variables with the potential of inclusion in a multifactorial analysis of the risk of falls. Nevertheless, these results highlight signs of impairment of central postural control in AD, which may require early therapeutic intervention.

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Section: Discussionsupporting

confidence: 50%

Postural Stability Analysis with Inertial Measurement Units in Alzheimer's Disease

Gago¹,

Basto‐Fernandes

Ferreira

et al. 2014

Dement Geriatr Cogn Disord Extra

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“…Persons that are at higher risk of falling may be especially susceptible to the effects of cooling due to changes in their postural control. These population groups include the elderly and/or persons having impaired balance due to a neurological or musculoskeletal disorder (Demura et al, 2005).…”

Section: Performance In Cold Physical Performancementioning

confidence: 99%

Human cold exposure, adaptation, and performance in high latitude environments

Mäkinen

2007

American J Hum Biol

108

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Cold exposure is present to significant amounts in the everyday occupational and leisure time activities of circumpolar residents. A cross-sectional population study demonstrated that Finns reported being exposed to cold on average 4% of their total time. Factors modifying cold exposure are: age, gender, employment, education, health, and amount of physical exercise. Several symptoms and complaints are associated with wintertime cold exposure and start to appear more commonly when temperatures decrease below -10 degrees C. Urban circumpolar people do not evidently demonstrate cold acclimatization responses in terms of changes in thermoregulation, probably due to behavioral factors (adequate protective clothing, short cold exposures, and high housing temperatures). With regard to performance, we observed that moderate cold exposure, which may occur in everyday life, affects cognition negatively through the mechanisms of distraction and both positively and negatively through the mechanism of arousal (increased vigilance). It seems that especially simple cognitive tasks are adversely affected by cold, while in more complex tasks performance may even improve in mild or moderate cold. Repeated, short cold exposures in the laboratory, causing cold habituation responses, do not markedly improve neuromuscular or cognitive performance. The article discusses the functional significance of cold exposure, adaptation, and the specific environmental conditions and physiological mechanisms that affect behavior and performance in high latitude environments.

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“…COP sway during standing has a close relationship with static balance ability [18,19,20] and sway characteristics from infants to the elderly have been studied [21,22]. In addition, until now, Timed "Up & Go" and Sit-to-Stand tests have been used to evaluate dynamic balance ability [12,13].…”

Section: Discussionmentioning

confidence: 99%

Laterality of Static and Dynamic Balance Abilities during One-leg Standing

Aoki¹,

Demura²,

Hirai³

2018

AJSSM

Self Cite

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Lower human limbs may not show laterality, differing from preferential use of upper limbs, because both legs are generally used at the same time. This study examined laterality of static and dynamic balance abilities during one-leg standing. The subjects were 100 healthy male university students (age 19.6 ± 2.4 years，height 172.3 ± 6.2 cm，weight 64.8 ± 8.5 kg). All subjects were judged right-leg dominant based on a previous survey. They underwent static and dynamic balance tests with each lower limb. A total path length during one-leg standing on a fixed stabilometer for the static balance test and an omnidirectional stability index during one-leg standing on an unstable platform (DYJOC Board) for the dynamic balance test was each used as an evaluation parameter. The mean of two trials was used as a representative value in each test. Intraclass correlation coefficients (ICCs) in both balance tests were very high (ICC = 0.75-0.91). A non-significant difference between means of dominant and non-dominant legs was found in both tests; their correlations were significant and high (0.93 and 0.75). In addition, a correlation between dynamic and static balance tests in both legs was found be significant but low (0.21-0.25). In conclusion, the laterality is not found in the static and dynamic balance abilities during one-leg standing evaluated by the tests selected in this study, and the relation between both abilities is negligible size.

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Body Sway Characteristics during Static Upright Posture in Healthy and Disordered Elderly

Cited by 15 publications

References 14 publications

Postural Stability Analysis with Inertial Measurement Units in Alzheimer's Disease

Postural Stability Analysis with Inertial Measurement Units in Alzheimer's Disease

Human cold exposure, adaptation, and performance in high latitude environments

Laterality of Static and Dynamic Balance Abilities during One-leg Standing

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