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Trunk and head displacements stabilized to perform both horizontal and vertical saccadic eye movements.
Figueiredo, Gabriella A; Paulo, Rafael M P; Barela, Ana M F; Bonnet, Cédrick T; Barela, José A.
Afiliação
  • Figueiredo GA; Institute of Biosciences, São Paulo State University, Rio Claro, SP, 13506-900, Brazil.
  • Paulo RMP; Institute of Biosciences, São Paulo State University, Rio Claro, SP, 13506-900, Brazil.
  • Barela AMF; Institute of Physical Activity and Sport Science, Cruzeiro do Sul University, São Paulo, SP, 01506-000, Brazil.
  • Bonnet CT; Univ. Lille, CNRS, UMR 9193 - SCALab - Sciences Cognitives et Sciences Affectives, F-59000, Lille, France.
  • Barela JA; Institute of Biosciences, São Paulo State University, Rio Claro, SP, 13506-900, Brazil. jose.barela@unesp.br.
Exp Brain Res ; 240(2): 503-509, 2022 Feb.
Article em En | MEDLINE | ID: mdl-34806138
Vision is crucial for humans to interact with their surrounding environment, and postural sway is reduced to allow short eye movements. However, the extent of subtle changes in postural control for horizontal and vertical eye movements remains unclear. The goal of this study was to investigate the effects of vertical and horizontal eye movements on head and trunk control in young adults. Fifteen healthy adults (23.4 ± 4.7 years) stood upright in three conditions for 60 s: fixation, horizontal, and vertical guided eye movements. In fixation, participants had to fixate on a stationary target. In both the horizontal and vertical eye movements, the target was presented with a frequency of 0.5 Hz and a visual angle of 11°. Eye displacement was monitored using a SMI eye tracker (ETG2.0) and trunk and head sway were monitored using infrared markers (Optotrak 3020, NDI). The mean sway amplitude was lower in both directions for eye movements and lowest in the vertical direction compared to the fixation condition. The sway area was also lower in vertical eye movement than in the fixation condition. We also found that the sway reduction was greater at head than at trunk level. The median frequency sway in the anterior-posterior direction was higher in both eye movements than in fixation. Based upon these results, we suggest that to perform short eye movements, postural sway is more strongly controlled at the head level than at the trunk and in vertical eye movements than in horizontal movements.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Movimentos Sacádicos / Movimentos Oculares Limite: Adult / Humans Idioma: En Revista: Exp Brain Res Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Movimentos Sacádicos / Movimentos Oculares Limite: Adult / Humans Idioma: En Revista: Exp Brain Res Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha