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The data sets generated during the current study are available from the corresponding author upon reasonable request., There is much evidence pointing out eye movement alterations in several neurological diseases. To the best of our knowledge, this is the first video-oculography study describing potential alterations of eye movements in the post-COVID-19 condition. Visually guided saccades, memory-guided saccades, and antisaccades in horizontal axis were measured. In all visual tests, the stimulus was deployed with a gap condition. The duration of the test was between 5 and 7 min per participant. A group of n=9 patients with the post-COVID-19 condition was included in this study. Values were compared with a group (n=9) of healthy volunteers whom the SARS-CoV-2 virus had not infected. Features such as centripetal and centrifugal latencies, success rates in memory saccades, antisaccades, and blinks were computed. We found that patients with the post-COVID-19 condition had eye movement alterations mainly in centripetal latency in visually guided saccades, the success rate in memory-guided saccade test, latency in antisaccades, and its standard deviation, which suggests the involvement of frontoparietal networks. Further work is required to understand these eye movements’ alterations and their functional consequences., This research was partially funded by RoboCity2030-DIH-CM Madrid Robotics Digital Innovation Hub (“Robotica aplicada a la mejora de la calidad de vida de los ciudadanos, Fase IV”; S2018/NMT-4331), funded by Comunidad de Madrid and cofunded by Structural Funds of the EU. and partially funded by Universidad Politécnica de Madrid, Vicerrectorado de Estrategia Académica e Internacionalización. Area Cooperación al Desarrollo. J. Benito-León is supported by the National Institutes of Health, Bethesda, MD, USA (NINDS #R01 NS39422 and R01NS094607), European Commission (grant ICT-2011-287739, NeuroTREMOR), the Ministry of Economy and Competitiveness (grant RTC-2015-3967-1, NetMD—platform for the tracking of movement disorder), and the Spanish Health Research Agency (grant FIS PI12/01602 and grant FIS PI16/00451.

Introduction: The saccadic paradigm has been used to investigate specific cortical networks involving attention. The behavioral and electrophysiological investigations of the SEM contribute significantly to the understanding of attentive patterns presented of neurological and psychiatric disorders and sports performance. Objective: The current study aimed to investigate absolute alpha power changes in sensorimotor brain regions and the frontal eye fields during the execution of a saccadic task. Methods: Twelve healthy volunteers (mean age: 26.25; SD: +/- 4.13) performed a saccadic task while the electroencephalographic signal was simultaneously recorded for the cerebral cortex electrodes. The participants were instructed to follow the LEDs with their eyes, being submitted to two different task conditions: a fixed pattern versus a random pattern. Results: We found a moment main effect for the C3, C4, F3 and F4 electrodes and a condition main effect for the F3 electrode. We also found interaction between factor conditions and frontal electrodes. Conclusions: We conclude that absolute alpha power in the left frontal cortex discriminates the execution of the two stimulus presentation patterns during SEM. (C) 2012 Elsevier Ireland Ltd. All rights reserved.

Dissertação de mestrado em Optometria Avançada, A medição da acuidade visual em populações com capacidades intelectuais, cognitivas e motoras diminuídas e em populações não cooperantes é um desafio, tendo em conta os testes que os profissionais de saúde têm disponíveis atualmente. Deste modo, torna-se essencial o desenvolvimento de um teste objetivo que responda às necessidades destes indivíduos. O principal objetivo deste estudo piloto foi investigar, através do princípio do olhar preferencial e de eyetracking, o padrão oculomotor durante a realização desta tarefa. A nove crianças, com idade média de seis anos, foram apresentadas dois tipos de imagens diferentes, uma com barras pretas e brancas, com frequências espaciais, e outra uniforme, sem barras. Neste estudo foram recolhidos e analisados dados sobre a latência, amplitude, direção e duração do movimento sacádico e sobre o tempo de fixação. Os resultados mostraram diferenças nos valores das variáveis medidas quando o olhar foi dirigido para o estímulo de barras (no caso de uma correspondência) e quando o olhar foi dirigido para um estímulo uniforme (sem barras) ou na direção errada (no caso de uma não correspondência). Estas diferenças nos movimentos oculares podem fornecer informações de que o estímulo foi ou não visto. A tarefa foi realizada com e sem conhecimento do teste proposto e não foram verificadas diferenças no padrão oculomotor. Isto mostra que, como esperado em tarefas de olhar preferencial, os olhos são atraídos automaticamente para o estímulo apresentado. Concluindo, os nossos resultados fornecem boas evidências de que o padrão oculomotor faculta informação credível acerca da acuidade visual e pode ser utilizado para desenvolver novos testes de acuidade visual para populações com necessidades especiais., Measuring visual acuity both in populations with intellectual, cognitive or physical disabilities and in non-cooperative populations can be very challenging, especially considering the tests that are currently available. Hence, developing an objective test that suits these individuals’ needs has become increasingly imperative. The aim of this pilot study was to investigate, using the preferential looking principle and eyetracking, the oculomotor pattern of behavior when performing this task. Nine children, with an average age of 6 years, were asked to look at two different types of pictures, one with a grid of black and white bars with spatial frequencies and other without bars. The study comprehended data collection and analysis on the latency, amplitude, direction and length of the movements and fixation time. Results show that there is a difference in the values of the variables measures when the look is directed to a grid with stimulus (in a case of correspondence) and when the look is directed to a uniform stimulus (no bars) or in the wrong direction (in case of no correspondence). This difference in eye movements can give information if the stimulus was seen or not seen. The task was performed with and without explaining the purpose test and there were no differences in oculomotor parameters. Showing, as expected in a preferential looking task, that the eyes was automatically attracted to the target. In conclusion, our results provide good evidence that oculomotor patterns, provided by the eyes, provide reliable information about acuity and can be used to conceive new acuity tests for special populations.