The influence of goal-directed reaching distance on standing postural control variability in non-disabled individuals

Jocemar Ilha; Mayara B. Récchia; Caroline C.  do Espírito Santo; Marcelo P. Pereira; Natália D. Pereira

doi:10.20338/bjmb.v16i2.272

The influence of goal-directed reaching distance on standing postural control variability in non-disabled individuals

Authors

Jocemar Ilha Physical Therapy Graduate Program, Department of Physical Therapy, Universidade do Estado de Santa Catarina (UDESC), Florianópolis, Santa Catarina, Brazil - jocemar.ilha@udesc.br
Mayara B. Récchia Physical Therapy Graduate Program, Department of Physical Therapy, Universidade do Estado de Santa Catarina (UDESC), Florianópolis, Santa Catarina, Brazil
Caroline C. do Espírito Santo Physical Therapy Graduate Program, Department of Physical Therapy, Universidade do Estado de Santa Catarina (UDESC), Florianópolis, Santa Catarina, Brazil
Marcelo P. Pereira Institute of Biosciences, Graduate Program in Movement Sciences, Posture and Gait Studies Laboratory (LEPLO), São Paulo State University (Unesp), Rio Claro, Brazil
Natália D. Pereira Department of Physical Therapy, Universidade Federal de São Carlos (UFSCar), São Carlos, São Paulo, Brazil

DOI:

https://doi.org/10.20338/bjmb.v16i2.272

Keywords:

Variability, Postural control, Task analysis, Standing, Dynamic stability, CoP analysis

Abstract

BACKGROUND: Performing everyday standing tasks is relevant to the individuals independence. It is a challenging postural action that requires upper extremity (UE) movements to interact with objects of the environment. Postural movement variability is a strategy of the postural system for exploring postural boundaries during the action. The distance to the target to be reached may affect the variability in postural control parameters.

AIM: To test if the variability in postural control parameters is enhanced by reaching beyond the UE-length during a goal-directed standing task.

METHOD: Twelve non-disabled adult individuals performed reaching to turn on a light switch (target) while standing, which was placed at 100% and 130% of the UE-length distance. The kinetic data were recorded using a force plate during the UE movement, and the centre of pressure (CoP) displacement variability index was calculated.

RESULTS: The variability index of the CoP displacement for reaching was greater at the distance of 130% of UE-length compared to 100% in both anterior-posterior and medial-lateral directions (p = 0.019). No differences in time to complete the task were observed.

CONCLUSION: Postural system increases the variability in postural controlling variable CoP displacement for reaching beyond the UE-length while standing. This movement variability helps individuals explore the boundaries of this standing action and may be useful for learning processes and counterbalancing postural disturbances.

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Published

2022-06-01

How to Cite

Ilha, J., Récchia, M. B., do Espírito Santo, C. C. ., Pereira, M. P., & Pereira, N. D. (2022). The influence of goal-directed reaching distance on standing postural control variability in non-disabled individuals. Brazilian Journal of Motor Behavior, 16(2), 143–152. https://doi.org/10.20338/bjmb.v16i2.272

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Issue

Vol. 16 No. 2 (2022)

Section

Special issue: The role of practice in motor learning

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