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.
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Showing 1 to 12 of 12 for “"frontal eye fields"”.
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NEURAL CORRELATES OF RANDOM AND INFORMED SACCADIC CHOICES IN THE MACAQUE FRONTAL EYE FIELDS AND CENTRAL THALAMUS
… loop that originates in and returns to the frontal eye fields (FEF). To examine how this circuit may contribute to saccade target selection, neural correlates of perceptual judgment and motor choice were evaluated for visuomotor neurons recorded in the FEF and OcTh. Monkeys performed a …
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A multimodal investigation in eye movements
… during a vergence movement (inward or outward eye rotation), task-modulated coactivation between ROIs is less understood. This study tests the following hypotheses: (1) significant task-modulated coactivation would be observed between the frontal eye fields (FEFs), the posterior parietal cortex …
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The Impact of Motivation on Object-Based Visual Attention Indexed by Continuous Flash Suppression.
… bilateral pulvinar, bilateral insula, left frontal eye fields, left inferior parietal cortex, and early visual cortex. Using the more robust technique, continuous flash suppression, in Chapter 4, we find no differentiation between stimuli based on mean amygdala responses. However, we show …
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Comparison of frontal and parietal cortices in the control of visual attention
… types of attentional control. Both the prefrontal and parietal regions are implicated as the source of this control. In order to investigate their relative roles we recorded simultaneously from both parietal cortex (specifically, the lateral intraparietal cortex) and prefrontal cortex …
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BRAIN MECHANISMS SUPPORTING EXPECTATION AND TOP-DOWN ATTENTION TO PAINFUL STIMULI
… parietal lobule/precuneus, dorsolateral prefrontal cortex (DLPFC) and cerebellum were implicated in these processes. In addition, attention to spatial and intensity features of pain activated intraparietal sulcus and frontal eye fields. These areas likely activated brain areas that were …
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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 …
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Neuro-zika: Brain structure and functional organization of adult humans with zika virus infection and severe neurological complications
… areas (supplementary motor cortex, specifically Frontal Eye Fields) and beyond (left inferior frontal sulcus). Additionally, gray matter volume increased in right middle frontal gyrus. Functional connectivity increased in a widespread network within and across temporal lobes. Here, preliminary …
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The nature of habits in the nonhuman primate : the formation of sequences of eye movements and neural activity in the frontal eye field
… independently moveable electrodes from the frontal eye fields (FEF), prefrontal cortex (PFC), and caudate nucleus (CN) simultaneously as naïve monkeys performed a free-viewing scan task. Neural recordings began on the first day of this task where a random dot on a grid of targets was chosen …
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Hostility and Cardiovascular Regulation: An Investigation of Lateralized Pre-Motor Functions
… extended to the investigation of the premotor frontal eye fields using rapid directional eye movements toward the contralateral hemisphere. It was predicted that high hostiles would evidence right frontal deficits in lateral eye movements (LEM) resulting in decreased LEM toward and within the …
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Eye-Tracking Measures of Attentional Bias In Cocaine Dependent Subjects
… between 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 …
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Processing of proper names in Mandarin Chinese : a behavioral and neuroimaging study
… names evoked significant activation in the frontal lobe including frontal eye fields and premotor area. Despite of modality, common nouns yielded significant activation in the left posterior temporal cortex. Further characteristic of processing of common nouns was activation in occipital …
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Quantification of neural substrates of vergence system via fMRI
Vergence eye movement is one of the oculomotor systems which allow depth perception via disconjugate movement of the eyes. Neuroimaging methods such as functional magnetic resonance imaging (fMRI) measure neural activity changes activity in the brain while subjects perform experimental tasks. A …