AUGMENTED MOVEMENT STRATEGIES FOR POSTURAL CONTROL IN PATIENTS WITH SPINOCEREBELLAR ATAXIA TYPE 3: A CASECONTROL STUDY

Autores/as

  • Arthur de Sá Ferreira
  • Marco Orsini
  • Lilian Ramiro Felício
  • Erika Carvalho Rodrigues
  • Jano Alves de Souza
  • Marco Antonio Araujo Leite
  • Acary Bulle Oliveira
  • Monara Nunes
  • Victor Hugo do Vale Bastos
  • Silmar Teixeira
  • Osvaldo J.M. Nascimento
  • Marcos RG de Freitas

DOI:

https://doi.org/10.46979/rbn.v52i4.5546

Palabras clave:

Neurologia,

Resumen

This study investigated the movement strategies for
postural control in patients with spinocerebellar ataxia type 3 (SCA3). Methods: This case-control study enrolled 5 patients with SCA3 (aged 41 to 51 years) and 5 healthy participants group-matched by age, body mass and body height. Participants performed 3 trials lasting 30 s each of postural tasks characterized by: feet apart or together; eyes open or closed. Center of pressure (CoP) data was quantifed using three-dimensional (3D: number of high-density and high-speed regions, average and maximal distances among regions), two-dimensional (2D: elliptical area, average velocity) and one-dimensional (1D: standard deviation, velocity) parameters. Results: Analysis of variance revealed signifcant interaction effect between group*task for 1D (F
12,238=3.496, p<0.001), 2D (F6,184=11.472, p<0.001), and 3D parameters (F12,238=2.543, p=0.004). Signifcant univariate effects for postural task were observed for all parameters, with higher body sway values under visual and biomechanical constraints,either separated or combined. Conclusions: Patients with SCA3 presented augmented
movement strategiescompared with healthy subjects, characterized by increasing body sway under more demanding biomechanical and/or visual constraints. Three-dimensional kinematic mapping revealed either random movement strategies or a unique movement strategy characterized by a stochastic CoP distribution, with high CoP speed to correct for large body sway deviations.

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Publicado

2017-01-23

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