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2014 | 15 | 4 | 227-233
Tytuł artykułu

A Critical Review of Position- and Velocity-Based Concepts of Postural Control During Upright Stance

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Purpose. Postural control during quiet standing has been modeled by concepts using kinematic variables estimated from center of pressure (COP) signals. The concept of position-based postural control has had particular ramifications in the literature, although a more recent concept of velocity-based control has been proposed as being more relevant. Methods. This study reviews the literature investigating these concepts and their respective quantitative methods alongside current supporting evidence and criticisms. Results. The position-based control concept suggests the existence of two control loops that alternate whenever certain thresholds are exceeded. Such a theory is supported by studies describing the time delay between the skeletal muscle activation and CoP displacement. However, this concept has been criticized to be the result of statistical artifacts due to it not being adapted to the analysis of bounded time series. Conversely, the velocity-based control concept claims that velocity is the most relevant kinematic variable for postural control. Such a theory suggests that postural adjustments are executed to change the trajectory of the CoP whenever the velocity crosses a threshold. Both theories have their major methodological limitations, while interpretation of data from the position-based concept is difficult, velocity-based thresholds are empirical and still need verification in different motor tasks and populations. Conclusions. Given the observed similarities and mutual exclusivity of both concepts, there is a need for the development of methods that can quantitatively analyze stabilometric signals while simultaneously considering both kinematic variables.
Słowa kluczowe
Wydawca
Czasopismo
Rocznik
Tom
15
Numer
4
Strony
227-233
Opis fizyczny
Daty
wydano
2014-12-01
otrzymano
2013-08-05
zaakceptowano
2014-11-07
online
2015-03-27
Twórcy
  • Augusto Motta University Center (UNISUAM), Rio de Janeiro, Brazil
  • Augusto Motta University Center (UNISUAM), Rio de Janeiro, Braz
Bibliografia
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  • 29. Moghadam M., Ashayeri H., Salavati M., Sarafzadeh J., Taghipoor K.D., Saeedi A. et al., Reliability of center of pressure measures of postural stability in healthy older adults: effects of postural task difficulty and cognitive load. Gait Posture, 2011, 33 (4), 651-655, doi: 10.1016/j. gaitpost.2011.02.016.[Crossref][WoS]
  • 30. Riccio G.E., Information in movement variability about the qualitative dynamics of posture and orientation. In: Newell K.M., Corcos D.M. (eds.), Variability and Motor Control. Human Kinetics, Champaign 1993, 317-357.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_1515_humo-2015-0016
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