Saccade accuracy as an indicator of the competition between functional asymmetries in vision

Tagu, Jérôme; Doré-Mazars, Karine; Vergilino-Perez, Dorine

doi:10.1007/s00221-019-05717-6

Cited by 4 publications

(2 citation statements)

References 54 publications

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“…The fixation stimulus in all parts of the experiment was a white dot (0.3 degrees of visual angle (dva) in diameter; x = 0.307, y = 0.295, Y = 47.290 cd/m 2 ) presented at screen centre on a black background (x = 0.271, y = 0.266, Y = 0.094 cd/m 2 ). All other stimuli had a diameter of 1 dva and appeared 1 Past evidence has shown no left-right asymmetry in saccades that could potentially affect performance at a saccade choice task (see, e.g., Honda, 2002;Tagu, Doré-Mazars, & Vergilino-Perez, 2020;Vergilino-Perez et al, 2012), so although we only covered the left eye, we are quite confident that the left-right differences we observe in the current study reflect naso-temporal asymmetries in choice.…”

Section: Stimulimentioning

confidence: 47%

Contrasting attentional biases in a saccadic choice task

2021

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To gain insight into how human observers select items in the visual field we pitted two attentional biases against one another in a single free choice design. The first bias is the nasal-temporal asymmetry during free choice tasks, where observers tend to choose targets that appear in their temporal hemifield over targets appearing in their nasal hemifield. The second is the choice bias found in studies of attentional priming. When observers have to select between a stimulus that shares features with a preceding target and a stimulus sharing features with previous distractors, they have a strong tendency to choose the preceding search target and this bias increases the more often the same search is repeated. Our results show that both biases affect saccadic choice, but they also show that the nasal-temporal bias can modulate the strength of the priming effects, but not vice versa. The priming effect was stronger for stimuli appearing in the temporal than in the nasal hemifield, but the nasal-temporal bias was similar for primed and unprimed targets. Additionally, our findings are the first to show how search repetition leads to faster saccades. The observed difference between the effects of the NTA and priming biases may reflect the difference in neural mechanisms thought to be behind these biases and that biases at lower levels may outrank higher-level biases, at least in their effect on visual attention.

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Section: Stimulimentioning

confidence: 47%

Contrasting attentional biases in a saccadic choice task

2021

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“…The saccadic generation and control centers are widely distributed among various brain, brainstem, and cerebellar regions [ 1 , 62 , 63 , 64 ]. As previously described, functional hemispheric asymmetry also influences saccadic eye movements, as saccadic accuracy appears sensitive to functional hemispheric asymmetries, such as lateralizing visuospatial attention in the right hemisphere [ 65 ].…”

Section: Discussionmentioning

confidence: 99%

Effects of Cervical Spinal Manipulation on Saccadic Eye Movements

Klotzek,

Jemni,

Groves

et al. 2024

Brain Sciences

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Quantifying saccadic eye movements can assist in identifying dysfunctional brain networks in both healthy and diseased people. Infrared Oculography is a simple and non-invasive approach to capturing and quantifying saccades, providing information that might aid in diagnosis and outcome assessments. The effect of spinal manipulation on quantified saccadic performance parameters has not been fully studied despite known post-manipulative effects on the brain and brainstem regions controlling them. This case study investigates spinal manipulation’s immediate and long-term effects on saccadic eye movements by quantifying the saccades of a male patient diagnosed with post-concussion syndrome. The patient performed horizontal saccades that were quantified before and immediately following cervical spinal manipulation both at the case study’s start and following a 2-week interim, during which the subject received six manipulative treatments. Immediate and long-term post-manipulative effects were observed, and the results revealed various post-manipulative effects across all quantified parameters in addition to between right and leftward saccades. The immediate post-manipulative effect was greatest at the case study’s onset, while the long-term right and leftward saccadic symmetry were most affected. The observations in this case study demonstrate that cervical spinal manipulation influences saccadic eye movements, providing new insights into its central neurological effects and therapeutic applications beyond its most commonly known use in pain management. More importantly, it encourages scientists to undertake further clinical investigations on wider scales.

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Vision et oculomotricité

Doré-Mazars,

Vergilino-Perez

2023

L’Année Psychologique

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L’étude des mouvements oculaires passionne les chercheurs depuis de nombreuses années. Nous explorons notre monde visuel et interagissons avec lui grâce à une alternance de saccades -qui déplacent le regard d’un point du champ visuel à un autre- et de fixations -pendant lesquelles l’information est traitée-. Caractériser le décours temporel et spatial de l’exploration oculaire permet ainsi de mieux comprendre les liens entre perception, action et cognition. Objets d’étude en tant que tels ou outils d’investigation de la cognition, les mouvements oculaires ont de tout temps été au cœur de travaux de recherche fondamentale, clinique ou appliquée. Cela est particulièrement le cas au sein de l’Institut de Psychologie où les recherches sur l’oculomotricité n’ont jamais cessé depuis les premiers travaux réalisés en psychologie expérimentale dans les années soixante jusqu’à aujourd’hui. La célébration du centenaire de l’Institut est l’occasion de mettre à l’honneur cette longue tradition d’études sur l’oculomotricité.

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Saccade accuracy as an indicator of the competition between functional asymmetries in vision

Cited by 4 publications

References 54 publications

Contrasting attentional biases in a saccadic choice task

Contrasting attentional biases in a saccadic choice task

Effects of Cervical Spinal Manipulation on Saccadic Eye Movements

Vision et oculomotricité

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