Pupilometria e controle postural durante movimentos sacádicos dos olhos a alvos imaginários em adultos jovens e idosos

• Autor(a) principal: Paschoalino, Gabriel Palmeira [UNESP]
• Data de Publicação: 2019
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/203926; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2020-03-13/000928759.pdf
• topic: Olhos - Movimentos; Postura humana; Envelhecimento; Eye - Movements

which utilizes information derived from various perceptual systems in order to produce adequate forces and, therefore, adequate body movements. There is an agreement on the substantial role of vision on postural control. However, there are discrepant evidence on the relationship between eye movements and postural control. Furthermore, there are gaps in the literature about the cognitive demands of postural control and the respective interactions with eye movements and retinal or extra-retinal information, besides the ageing related changes. The measurement of pupil diameter predicts the required cognitive workload when one is facing different task-related demands. Therefore, provides the further understanding of neural mechanisms between eye movements and the control of posture. In this study, the main goal was to analyze the pupil diameter during postural, visuo-motor tasks in young and older adults. Ten elder and fifteen young adults stood upright in a narrow stance before and after training to execute saccadic eye movements to imaginary targets. Postural sway and pupil diameter were analyzed. Saccadic eye movements reduced AP body sway, p < 0,001. Post-hoc analysis revealed that, within imaginary visual tasks, AP body sway was greater for the elderly group, p = 0,049. Interestingly, saccadic eye movements attenuated body sway area within the young adults, p = 0,032, whilst body sway area increased in the elderly group, p = 0,036. Imaginary visual tasks evoked greater mean pupil dilatation compared to real visual tasks, p < 0,01. Finally, the young adults exhibited greater mean pupil dilatation during fixations and saccades compared to the elderly group... (Complete abstract electronic access below)