Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 24 for “"saccadic eye movements"”.
-
Optimal control strategies for saccadic eye movements in humans
… will be utilized within the context of the human eye system. After establishing the mathematical description of ocular dynamics we shall explore the differences between the linear system and nonlinear system, controllability, parameter sensitivity, and the use of time optimal control as an …
-
On the posterior parietal cortex and saccadic eye movements
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Brain and Cognitive Sciences, 1991.
-
Visual stability: perception of stable objects across saccadic eye movements
… our discrimination abilities. Moreover, active movements help us to form a complete sense of space.
-
Visual working memory supports perceptual stability across saccadic eye movements
Vision is suppressed during saccadic eye movements. To create a stable perception of the visual world we must stitch together the gaps in visual input caused by this suppression. Early theories of perceptual stability proposed that information about the position of the eye could be used to cancel …
-
THE EFFECTS OF PARKINSON’S DISEASE AND ASSOCIATED TREATMENTS ON SACCADIC EYE MOVEMENTS
Eye movements are used as a biomarker of neuropsychiatric and neurological function because they are highly sensitive to cognitive state and impairment. For this reason, eye movements have been used to study Parkinson’s disease in order to bypass the distal limb motor deficits seen with disease …
-
The role of frontal cortex in the generation of saccadic eye movements and fixation
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Brain and Cognitive Sciences, 1995.
-
Exploring Interactions Between Attention and Perception in Saccadic Eye Movements and Frontal Eye Field Cell Responses
The question of where to look next is resolved several times every second, but the process leading up that decision involves multiple neuronal mechanisms that are at least partially dissociable. Perceptual decision making is the interplay between perception of the visual scene, attention to …
-
Inhibitory Control of Saccadic Eye Movements in Reading: A Neurophysiologically Based Interaction -Competition Theory of Saccade Programming
… the predicted nature of inhibitory control of eye movement in reading. Further directions for exploring the underlying process of eye movement control in reading are also discussed, including the parametric adjustment of saccade programming in different types of reading tasks, the process of …
-
Impact of Central Vision Loss on Eye Movements and Time-to-Contact Judgments
… (TTC) judgments can be influenced by eye movements as well as by multisensory stimuli (i.e., presenting a stimulus that has both an auditory and visual component). To date, no study has investigated the interaction between eye movements and unimodal (visual-only) versus multimodal …
-
Two methods of biomarker discovery: applications in neuropathic pain and pharmacotherapy.
… The top-down approach explored the utility of saccadic eye movements as an objective, functional biomarker of sedation, an adverse effect associated with opioid treatment of pain. This study compared the interaction between sleep deprivation and opioids on opioid-naïve with opioid-tolerant …
-
Balance Performance in Adolescents Following a Concussion
… addressed the association between balance and saccadic eye movements in concussed adolescents. Impaired saccadic eye movements are an important consequence of concussion and may be associated with balance deficits since both processes are dependent on several of the same cortical structures and …
-
Visual-auditory interstimulus contingency effects in saccade programming
… contingencies on the latencies and amplitudes of saccadic eye movements. In a new experimental procedure, the interstimulus contingencies were defined in the locations of a target and an accompanying stimulus rather than in the mere presence or absence of the stimuli. Human subjects were asked to …
-
Cat and monkey V1 neurons : comparison of the responses to sustained and transiently presented stimuli
… well as cats and monkeys) is largely guided by saccadic eye movements that punctuate brief fixations (lasting on the order of a few hundred milliseconds). This results in transient stimulation of the visual system. Because V1 neurons are known to express a variety of nonlinear behaviors, some of …
-
Impacts of Placental Growth Factor Deficiency and of Preeclampsia on Brain Development and Function
… functions through psychometric testing and eye tracking of saccadic eye movements. Brain structural and vascular anatomy were assessed in the same children through MRI. Pgf-/- mice displayed reduced and aberrant uteroplacental vascular structure, particularly when conceptus-derived PGF was …
-
Using Eye Movements to Establish a Normative Database of Control Participants Across the Lifespan
… probe cognitive function through the analysis of saccadic eye movements. We used a video-based eye tracker capable of measuring various saccade metrics on an interleaved pro- and anti-saccade task in healthy participants 5-85 years of age. The interleaved pro- and anti-saccade task requires the …
-
Cortical location of saccadic and vergence oculomotor learning using fMRI
… about the external world via the visual system. Eye movements are used to direct the visual information of interest to the fovea, the area of the retina which has the highest density of photoreceptors, and the largest amount of cortical area. This research will study how two of the five eye …
-
Using event-related potentials to monitor the time course of mental processing during eye fixations in reading
… of processing events that take place during eye fixations in reading was tested. The method was employed to determine the earliest point in time that orthographic information is utilized during an eye fixation in normal reading. Right handed male and female university students silently read …
-
Comparison of anaerobic and aerobic fatigue on visual skills
… quantitative testing for accommodation facility, saccadic eye movements, speed of recognition, hand-eye coordination, peripheral awareness, and visual memory. One week later, the TG participants returned to complete a short supramaximal effort cycle ergometer test (SCT) immediately followed by the …
-
Eye-Tracking Measures of Attentional Bias In Cocaine Dependent Subjects
… the higher-order cortical processes (frontal eye-fields, DLPFC) in voluntary eye control (i.e., anti-saccades) and more reflexive saccades driven by involuntary midbrain (superior colliculus) perceptual input (i.e., pro-saccades). In addition, neuroimaging studies in patients with cocaine …
-
Eye movement control during reading : factors and principles of computing the word center for saccade planning
… of visual stimuli. Due to the physiology of the eye, only a small number of letters around the fixation position can be extracted with high visual acuity, while the visibility of words and letters outside this so-called foveal region quickly drops with increasing eccentricity. As a consequence, …
Page 1 of 2