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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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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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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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Christopher K. Rhea, Jed A. Diekfuss, Jeffrey T. Fairbrother and Louisa D. Raisbeck

Postural control is a complex task that becomes more difficult with age ( Costa et al., 2007 ; Maki & McIlroy, 1996 ; Shaffer & Harrison, 2007 ), which can lead to increased fall risk ( Ambrose, Paul, & Hausdorff, 2013 ; Melzer, Benjuya, & Kaplanski, 2004 ; Rubenstein, 2006 ). Since the cause

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Adam C. King

) following the resolution of cognitive and behavioral symptoms; however, asymptomatic individuals often exhibit persist motor impairments in locomotion 1 and postural control 2 that can extend beyond acute recovery. Therefore, a need remains relative to concussion evaluations to detect subtle motor

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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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Sunghoon Shin and Jacob J. Sosnoff

Sitting is one of the primary daily postures ( Shirado, Kawase, Minami, & Strax, 2004 ). Seated postural control is not simply a passive alignment of body segments but is rather a complex task that can be influenced by a variety of factors, including sensorimotor processing, biomechanical