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 - [email protected]
  • 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

Issue

Section

Special issue: The role of practice in motor learning