Dissertations / Theses on the topic 'Saccadic eye movements'
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Harwood, Mark Richard. "The Fourier analysis of saccadic eye movements." Thesis, University College London (University of London), 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.407929.
Full textNotice, Keisha Joy. "Visual working memory and saccadic eye movements." Thesis, Anglia Ruskin University, 2013. http://arro.anglia.ac.uk/332975/.
Full textWu, Chao-Yen. "Long-range predictors for saccadic eye movements." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184465.
Full textThurtell, Matthew James. "Effect of eye position on the three-dimensional kinematics of saccadic and vestibular-evoked eye movements." Thesis, The University of Sydney, 2005. http://hdl.handle.net/2123/1665.
Full textThurtell, Matthew James. "Effect of eye position on the three-dimensional kinematics of saccadic and vestibular-evoked eye movements." Faculty of Medicine, 2005. http://hdl.handle.net/2123/1665.
Full textSaccadic and vestibular-evoked eye movements are similar in that their three-dimensional kinematic properties show eye position-dependence. When the line of sight is directed towards an eccentric target, the eye velocity axis tilts in a manner that depends on the instantaneous position of the eye in the head, with the magnitude of tilt also depending on whether the eye movement is saccadic or vestibular-evoked. The mechanism responsible for producing eye velocity axis tilting phenomena is not well understood. Some authorities have suggested that muscle pulleys in the orbit are critical for implementing eye velocity axis tilting, while others have suggested that the cerebellum plays an important role. In the current study, three-dimensional eye and head rotation data were acquired, using the magnetic search coil technique, to confirm the presence of eye position-dependent eye velocity axis tilting during saccadic eye movements. Both normal humans and humans with cerebellar atrophy were studied. While the humans with cerebellar atrophy were noted to have abnormalities in the two-dimensional metrics and consistency of their saccadic eye movements, the eye position-dependent eye velocity axis tilts were similar to those observed in the normal subjects. A mathematical model of the human saccadic and vestibular systems was utilized to investigate the means by which these eye position-dependent properties may arise for both types of eye movement. The predictions of the saccadic model were compared with the saccadic data obtained in the current study, while the predictions of the vestibular model were compared with vestibular-evoked eye movement data obtained in a previous study. The results from the model simulations suggest that the muscle pulleys are responsible for bringing about eye position-dependent eye velocity axis tilting for both saccadic and vestibular-evoked eye movements, and that these phenomena are not centrally programmed.
Richard, Alby-Réal. "The interaction of visual perception and saccadic eye movements." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=123018.
Full textAu cours de l'évolution, les primates ont développé des mouvements oculaires rapides, ou les saccades. Bien que les saccades soient généralement une fonction adaptive, elles engendrent des défis important au près du système visuel qui cherche à maintenir une perception stable sur le monde. À chaque mouvement de l'axe visuel, que ce soit les yeux seuls ou la tête en combinaison avec les yeux, la rétine reçoit une nouvelle image du monde. La majorité des observateurs n'a pas conscience de ce flux important d'information rétinienne discontinue et perçoit plutôt un monde stable d'un regard à l'autre. Ce phénomène de consolidation de l'influx visuel saccadé en une perception stable et fluide du monde est intitulé le problème de la « perception stable trans-saccadique ». Le phénomène de la « perception stable trans-saccadique » peut être étudié par le biais d'une approche scientifique rigoureuse qui se penche sur la manière dont la perception visuelle évolue à travers les mouvements oculaires. Notamment, il a été démontré que les cibles présentées très brièvement lors d'un saccade sont perçu de façon erronée par rapport à leur emplacement spatial véridique, le phénomène des erreurs de localization peri-saccadique (ELPS). Ces erreurs prédictibles et systématiques sont de deux types : le premier est un simple déplacement dans la direction de la saccade ; le deuxième est sous forme de compression vers l'objet cible. Ce dernier type d'erreur, la compression du champ visuelle vers l'objet de la saccade, est le phénomène principal dont cette thèse s'est servi pour étudier les mécanismes qui engendrent la stabilité visuelle lors des saccades. Une série d'expérience psychophysique a donc été réalisée pour explorer les signaux qui entre en jeux lors du jugement spatial de la cible d'une saccade.Dans le premier chapitre, nous avons élucidé un schéma expérimental qui décrit l'interaction d'un signal oculomoteur qui encode le mouvement oculaire avec un signal visuel qui encode la position de la cible. Selon notre formulation, l'issue de cette interaction est directement reliée au positionnement perçu de la cible qui est présentée autour d'une saccade. Ce modèle a reproduit non seulement les résultats de notre laboratoire mais aussi ceux d'un collaborateur extérieur dont nous avons reçus que les données brutes. Suite à ce premier succès, lors du deuxième chapitre nous nous sommes orientés vers la nature même du signal oculomoteur. Nous avons accomplit cette tache en utilisant une variété de conditions expérimentales qui visaient à préciser si le signal visuel encodait le mouvement oculaire seule ou en conjonction avec le mouvement de la tête. Nos résultats ont clairement démontré que le phénomène de compression est en effet lié à la combinaison des mouvements des yeux et de la tête, que la compression était vers le but du regard et non l'objet de la saccade en tant que tel. Ces expériences nous ont aussi permis de décrire plus précisément les paramètres et les conditions qui affectent la compression. Armé de notre compréhension de l'effet de compression ci-haut et de ses signaux biologiques probables, lors du dernier chapitre nous avons employés notre model biologique pour comprendre davantage la manière dont la vision chez les patients atteints de la schizophrénie pourrait être altérée lors des saccades. Plus spécifiquement, nous avons étudié l'hypothèse que la décharge corollaire (DC) des voies optiques pourrait être altérée chez les patients schizophrènes. Nos études ont en effet souligné que lors des saccades, les patients schizophrènes démontrent des différences qualitatives en terme d'erreur de localisation de signal par rapport aux patients du groupe témoin. Le résultat de cette étude à démontrer que le DC dans les schizophrènes était différent que chez les contrôles, et que cette différence était suffisante pour expliquer les différences remarquées dans leur perception visuelle autour des saccades.
Bracewell, Robert Martyn. "On the posterior parietal cortex and saccadic eye movements." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/12958.
Full textKrantz, John H. "Changes in detectability of direction and motion associated with saccadic eye movements." Gainesville, FL, 1988. http://www.archive.org/details/changesindetecta00kran.
Full textKlier, Eliana Mira. "Three-dimensional visual-motor geometry of human saccades." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ27359.pdf.
Full textDoig, Henry Ross. "An investigation of the pre-saccadic spike potential." Thesis, Aston University, 1990. http://publications.aston.ac.uk/14625/.
Full textShin, SooYoon. "Role of the primate basal ganglia in saccadic eye movements." UNIVERSITY OF PITTSBURGH, 2012. http://pqdtopen.proquest.com/#viewpdf?dispub=3485870.
Full textRichardson, Brian. "Smooth-pursuit and saccadic eye movements: One clock or two?" Thesis, University of Ottawa (Canada), 2008. http://hdl.handle.net/10393/27649.
Full textHill, Anna Christine. "Neurophysiological studies of memory-guided saccadic eye movements in man." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322814.
Full textShaunak, Sandip. "Frontal lobe and basal ganglia control of saccadic eye movements." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299858.
Full textColes, Peter Richard. "The development of saccadic eye movements during visual spatial tasks." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238172.
Full textHardwick, David R., and na. "Factors Associated with Saccade Latency." Griffith University. School of Psychology, 2008. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20100705.111516.
Full textHardwick, David R. "Factors Associated with Saccade Latency." Thesis, Griffith University, 2008. http://hdl.handle.net/10072/365963.
Full textThesis (Masters)
Master of Philosophy (MPhil)
School of Psychology
Griffith Health
Full Text
Craven, Benjamin Joseph. "Saccadic undershoot and the perception of lateral spatial extent." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302947.
Full textKlingenhöfer, Steffen [Verfasser], and Frank [Akademischer Betreuer] Bremmer. "Perceptual stability during saccadic eye movements / Steffen Klingenhöfer. Betreuer: Frank Bremmer." Marburg : Philipps-Universität Marburg, 2012. http://d-nb.info/1028072627/34.
Full textMannan, Sabira Khanam. "The visual analysis of complex scenes." Thesis, Imperial College London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321654.
Full textLudwig, Casimir Johannes Hendrikus. "Stimulus-driven and goal-driven control over visual selection." Thesis, University of Bristol, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269218.
Full textMitchell, Jude F. "Unity of action : coordination of movement plans between oculomotor areas /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2002. http://wwwlib.umi.com/cr/ucsd/fullcit?p3055792.
Full textKavasakali, Maria. "Saccadic eye movement measurements in the normal eye : investigating the clinical value of a non-invasive eye movement monitoring apparatus." Thesis, University of Bradford, 2005. http://hdl.handle.net/10454/3577.
Full textPearson, Benjamin Cann. "Using saccadic latency to assess traumatic brain injury." Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609562.
Full textOhl, Sven. "Small eye movements during fixation : the case of postsaccadic fixation and preparatory influences." Phd thesis, Universität Potsdam, 2013. http://opus.kobv.de/ubp/volltexte/2014/6986/.
Full textDie Beschreibung des Blickbewegungsverhaltens als eine sich abwechselnde Folge von Sakkaden und Fixationen stellt eine starke Vereinfachung dar, denn auch während einer Fixation bewegen sich die Augen. Typischerweise treten Bewegungen von kleiner Amplitude (z.B. Mikrosakkaden), 1-2 mal pro Sekunde während einer Fixation auf. Frühe Studien zu Mikrosakkaden wurden von Fragen bezüglich des Einflusses von Mikrosakkaden auf die visuelle Wahrnehmung, und Studien zu der Rolle von Mikrosakkaden bei der Fixationskontrolle dominiert. Fehlende Evidenz für eine Rolle, die ausschließlich Mikrosakkaden zufällt, führten zu einer sehr kritischen Betrachtung von Mikrosakkaden. In den letzten Jahren rückten Mikrosakkaden wieder mehr in den Fokus. Vielerlei Zusammenhänge mit Wahrnehmung, okulomotorischer Kontrolle und Kognition, sowie neue Erkenntnisse bezüglich der neurophysiologischen Implementierung von Mikrosakkaden konnten aufgedeckt werden. In den letzten Jahren wurden verschiedene Modelle der Mikrosakkadengenerierung vorgestellt. Auch wenn sich diese in ihren exakten Mechanismen unterscheiden, so teilen sie doch die Annahme, dass Mikrosakkaden in einer topographisch organisierten motorischen Karte für Sakkaden ausgelöst werden. Diese Karten beinhalten eine Repräsentation für klein-amplitudige Sakkaden im Zentrum der Karte (mit dem rostralen Pol der colliculi superiores als neurophysiologische Implementierung). In der vorliegenden Arbeit kritisiere ich, dass Modelle der Mikrosakkadengenerierung ausschließlich auf Resultaten langanhaltender präsakkadischer Fixation beruhen. Ich führe an, dass Mikrosakkaden in einer natürlicheren Situation untersucht werden sollten, nämlich während der Fixation nach einer großen Sakkade. Die Untersuchung postsakkadischer Fixation bietet eine neue Möglichkeit Modelle der Mikrosakkadengenerierung zu falsifizieren. In den Studien zeige ich, dass Signale über den Fehler in der Sakkadenlandeposition (visuelle und extra-retinale), sowie fehler-unabhängige Signale, wie die Zielreiz-Exzentrizität, einen entscheidenden Einfluss auf kleine Sakkaden haben. Diese Resultate erfordern Modifikationen an dem kürzlich eingeführten Modell von Rolfs, Kliegl und Engbert (2008), um die Generierung von kleinen Sakkaden auch während der postsakkadischen Fixation erklären zu können. Darüber hinaus präsentiere ich eine viel versprechende Ereigniszeitanalyse, die uns erlaubt zeitabhängige Einflüsse auf das postsakkadische Blickbewegungsverhalten zu untersuchen. Außerdem untersuche ich das Zusammenspiel von postsakkadischen Augenbewegungen und postsakkadischen Positionsurteilen. Dabei wird die Bedeutung von postsakkadischen Augenbewegungen als Kovariate in den statistischen Analysen betont. Ein zweites Ziel dieser Arbeit besteht darin Modellvorhersagen bezüglich vorbereitender Einflüsse auf die Mikrosakkadengenerierung zu untersuchen. Die Ergebnisse, hinsichtlich eines signifikanten Einflusses des preparatory set auf die Mikrosakkadenrate unterstützt die wesentliche Modellannahme, dass erhöhte fixationsbezogene Aktivität zu einer größeren Anzahl an Mikrosakkaden führt. In der vorliegenden Arbeit präsentiere ich wichtige Einflüsse auf die Generierung von kleinen Sakkaden während der Fixation. Diese Augenbewegungen stellen ein vielseitiges okulomorisches Verhalten dar, welche weiterhin zahlreiche Fragen mit sich bringen und sicherlich zukünftige Studien zu Wahrnehmung und Kognition beeinflussen werden.
Savina, Olga. "Effects of training to an area-cue on human saccadic eye movements." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=100209.
Full textGilman, Elizabeth R. "Towards an eye-movement model of music sight-reading." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342467.
Full textMezey, Laura Elisabeth. "The adaptive control of saccades in normal and abnormal children and adults." Thesis, University College London (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343722.
Full textTaylor, Kathleen. "Computational modelling of the contribution of posterior parietal cortex to saccadic eye movements." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302125.
Full textBell, Paul. "The use of saccadic eye movements in the clinical psychopharmacology of psychotropic drugs." Thesis, Queen's University Belfast, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261766.
Full textTurner, Travis Henry. "Validation of a new method for neurobehavioral testing of oculomotor function." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2007. http://wwwlib.umi.com/cr/ucsd/fullcit?p3259051.
Full textTitle from first page of PDF file (viewed June 11, 2007). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 171-178).
Diamond, Mark R. "The effect of saccades on visual sensitivity and time perception /." Connect to this title, 2002. http://theses.library.uwa.edu.au/adt-WU2003.0038.
Full textUnsworth, David I. "Working memory capacity and the control of saccades : individual differences in executive control." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/30980.
Full textRyan, Suzanne. "The role of the posterior parietal cortex in the planning of saccadic eye movements." Thesis, University of Nottingham, 2007. http://eprints.nottingham.ac.uk/10290/.
Full textSommer, Marc A. (Marc Alois). "The role of frontal cortex in the generation of saccadic eye movements and fixation." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/32678.
Full textCampbell, Pauline Elizabeth. "The utility of the auditory brainstem response in children with atypical saccadic eye movements." Thesis, University of Plymouth, 2014. http://hdl.handle.net/10026.1/2931.
Full textDiamond, Mark R. "The effect of saccades on visual sensitivity and time perception." University of Western Australia. School of Psychology, 2003. http://theses.library.uwa.edu.au/adt-WU2003.0038.
Full textFarber, Robert H. "Ocular motor system functioning in obsessive-compulsive disorder and Tourette syndrome /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC IP addresses, 1998. http://wwwlib.umi.com/cr/ucsd/fullcit?p9917950.
Full textManca, Giulia [Verfasser], and Heiner [Akademischer Betreuer] Deubel. "Dynamical and metrical adaptation of saccadic eye movements in humans / Giulia Manca ; Betreuer: Heiner Deubel." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2021. http://d-nb.info/1241963789/34.
Full textWhitchurch, Elizabeth A. "Audiovisual integration in the saccadic system of the barn owl /." view abstract or download file of text, 2006. http://proquest.umi.com/pqdweb?did=1280135971&sid=3&Fmt=2&clientId=11238&RQT=309&VName=PQD.
Full textTypescript. Includes vita and abstract. "These investigations were supported in part by the National Institute on Deafness and Communication Disorders ... and the National Institute of General Medical Sciences"--P. viii. Includes bibliographical references (leaves 142-152). Also available for download via the World Wide Web; free to University of Oregon users.
Berry, Donna M. "The contributions of inhibitory control, attention and working memory to the control of saccadic eye movements." Thesis, Lancaster University, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.618555.
Full textAlhazmi, Mohammed. "Effect of ocular rigidity upon the dynamic characteristics of saccadic, smooth pursuit and disparity vergence eye movements." Thesis, Glasgow Caledonian University, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.676478.
Full textGregory, Nicola Jean. "The influence of socio-biological cues on saccadic orienting." Thesis, University of Exeter, 2011. http://hdl.handle.net/10036/3231.
Full textCoughlin, Michael J., and n/a. "Calibration of Two Dimensional Saccadic Electro-Oculograms Using Artificial Neural Networks." Griffith University. School of Applied Psychology, 2003. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030409.110949.
Full textCoughlin, Michael J. "Calibration of Two Dimensional Saccadic Electro-Oculograms Using Artificial Neural Networks." Thesis, Griffith University, 2003. http://hdl.handle.net/10072/365854.
Full textThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Applied Psychology
Griffith Health
Full Text
Buonocore, Antimo. "Remote distractor effects in saccadic, manual and covert attention tasks." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/5850.
Full textIstvan, Peter John. "The intrinsic organization and characteristics of neurons in monkey superior colliculus and their role in saccadic eye movements." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/nq22467.pdf.
Full textMunro, N. A. R. "The control of saccadic and smooth pursuit eye movements in patients with lesions of the central nervous system." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319050.
Full textAwater, Holger. "Perception of visual space at the time of saccadic eye movements Wahrnehmung des visuellen Raumes im Zeitraum sakkadischer Augenbewegungen /." [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965503003.
Full textKovalenko, Lyudmyla. "The temporal interplay of vision and eye movements." Doctoral thesis, Humboldt-Universität zu Berlin, Lebenswissenschaftliche Fakultät, 2016. http://dx.doi.org/10.18452/17507.
Full textThe visual system achieves a tremendous amount of processing as soon as we set eyes on a new object. Numerous processes are active already before eyes reach the object. This thesis explores the spatio-temporal properties of three such processes: attentional enhancement and saccadic suppression that accompany saccades to target; attentional selection of target in a visual search task; the timecourse of target detection accuracy under object-substitution masking. We monitored these events using a combination of human electrophysiology (EEG), eye tracking and behavioral psychophysics. We first studied how the neural representation of a visual stimulus is affected by its temporal proximity to saccade onset. We show that stimuli immediately preceding a saccade show strongest effects of attentional enhancement and saccadic suppression. Second, using object-substitution masking to reduce visibility, we analyzed the relationship between saccadic reaction times and response accuracy. We also collected subjective visibility ratings and observed neural markers of attentional selection, such as the negative, posterior-contralateral deflection at 200 ms (N2pc). We found that fast saccades escaped the effects of masking, resulted in higher response accuracy and higher awareness ratings. This indicates that early visual processing can trigger awareness and correct behavior. Finally, we replicated this finding with manual responses. Discovering a similar accuracy timecourse in a different modality ruled out saccade-specific mechanisms, such as saccadic suppression and retinal shift, as a potential confound. Next to their theoretical impact, all studies make a methodological contribution to EEG-eye movement research, such as removal of large-scale saccadic artifacts from EEG data and composition of matched surrogate data. In sum, this work uses multiple approaches to describe the dynamics of visual perisaccadic perception and offers solutions for future studies in this field.