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Ming Fung Godfrey Lui, Hung Kay Daniel Chow, Wai Ming Kenny Wong, and Wai Nam William Tsang

 al., 2010 ). However, recent studies have begun to demonstrate that melatonin may disturb postural control in older adults. Otmani et al. ( 2012 ) used a randomized, double-blind, single-dose, three-way crossover study design to investigate the effects of a 2-mg dose of zolpidem, a prolonged

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Tyler W.D. Muddle, David H. Fukuda, Ran Wang, Joshua J. Riffe, David D. Church, Kyle S. Beyer, Jay R. Hoffman, and Jeffrey R. Stout

Balance and postural control rely on the body’s ability to integrate information from the sensory-motor chain, vestibular, somatosensory, and visual systems ( Nasher, 1997 ). The vestibular system is sensitive to position and movements of the head with respect to gravity and inertial forces. The

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Lyn Nakagawa and Mark Hoffman

Objective:

To evaluate postural control in individuals with recurrent ankle sprains with static, dynamic, and clinical balance tests and to examine the relationships between performances in each of these tests.

Design:

Postural control was evaluated with 3 different balance tests in individuals with and without recurrent ankle sprains.

Participants:

19 volunteers with recurrent ankle sprains and 19 uninjured control subjects.

Interventions:

None.

Setting:

University sports-medicine research laboratory.

Main Outcome Measures:

Total excursion of the center of pressure (COP) was calculated for the static and dynamic balance tests. Total reach distance was measured for the Star Excursion Balance Test.

Results:

Subjects with recurrent ankle sprains demonstrated significantly greater excursion of the COP in both the static and dynamic balance tests. Correlations between performances in all tests were very low.

Conclusions:

Recurrent ankle sprains might be associated with reduced postural control as demonstrated by decreased performance in static and dynamic balance tests.

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Bożena Wojciechowska-Maszkowska, Dorota Borzucka, Aleksandra Maria Rogowska, and Michał Kuczyński

Physical activity is known to have beneficial effects on a host of factors related to physical and mental health, and positively affects postural control. However, there is no agreement on which measures of postural control and to what extent they are dependent on the past and present physical activity in older adults. To answer this question we compared the postural performance in a 20-s quiet stance with eyes open on a Kistler force plate in 38 subjects, aged 60–92, who were formerly and are currently physically active (AA) with those who were always inactive (II) and those who were either formerly (AI) or are currently (IA) active. Results indicated that only current activity promoted better postural control while former activity was ineffective. Postural control in AA and IA was very similar and much better than in II and AI who, in contrast, displayed similarly deteriorated postural control.

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Murielle Grangeon, Cindy Gauthier, Cyril Duclos, Jean-Francois Lemay, and Dany Gagnon

The study aimed to (1) compare postural stability between sitting and standing in healthy individuals and (2) define center-of-pressure (COP) measures during sitting that could also explain standing stability. Fourteen healthy individuals randomly maintained (1) two short-sitting positions with eyes open or closed, with or without hand support, and (2) one standing position with eyes open with both upper limbs resting alongside the body. Thirty-six COP measures based on time and frequency series were computed. Greater COP displacement and velocity along with lower frequency measures were found for almost all directional components during standing compared with both sitting positions. The velocity, 95% confidence ellipse area, and centroidal frequency were found to be correlated between unsupported sitting and standing. Despite evidenced differences between sitting and standing, similarities in postural control were highlighted when sitting stability was the most challenging. These findings support further investigation between dynamic sitting and standing balance.

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Lilly H. VanDeMark, Christina B. Vander Vegt, Cassie B. Ford, Jason P. Mihalik, and Erik A. Wikstrom

Postural control is a continuous task maintained by the integration of visual, vestibular, and somatosensory system feedback and efferent responses. 1 The contribution of each sensory modality (ie, the sensory organization strategy) is internally modulated, spontaneously, depending on the

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Courtney DeFeo, Nicholas Heebner, Carrie Baker, Matthew Hoch, and Nathan Morelli

Mild traumatic brain injuries (mTBIs), commonly referred to as concussions, are a prevalent pathology in young adults and athletes. 1 Prevalent postinjury impairments that include postural control deficits, dizziness, and vestibular functional abnormalities are seen in 50% to 80% of athletes. 2

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Pedro Paulo Deprá, Avelino Amado, and Richard E.A. van Emmerik

Many activities of daily living require the integration between postural control and other movements of the body, such as manual movements or tracking visual objects in the environment with the head and eyes. Perceptual information pertaining to the environment coupled with the intrinsic properties

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Bradley C. Jackson, Robert T. Medina, Stephanie H. Clines, Julie M. Cavallario, and Matthew C. Hoch

control or balance. 7 Postural control impairments may be associated with alterations in arthrokinematics, which occur as a result of joint trauma. 8 Although other factors may also contribute to alterations in postural control, this paper will focus on the influence of arthrokinematic alterations

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Heloisa Suzano de Almeida, Flávia Porto, Marcelo Porretti, Gabriella Lopes, Daniele Fiorot, Priscila dos Santos Bunn, and Elirez Bezerra da Silva

modulation of the postural movement ( Cui et al., 2017 ; Keus et al., 2004 ; Xu et al., 2014 ). These motor alterations caused by PD may compromise the autonomy, postural control, sleep quality, and self-esteem of the individual and can trigger anxiety and depression, affecting the quality of life and