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 15 of 15 for “"hemifield"”.
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The Use of Hemifield Eye-Patching for Modifying the Perceptual-Attentional Bias in Healthy Individuals
… spatial bias via modification of PA but not MI, hemifield eye patches that occluded the left or right half of the visual field have been shown to be more effective at modifying spatial bias, but only in patients with spatial neglect. Furthermore, it is unclear whether hemifield patching affects …
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Cortical competition: a neurally plausible account of hemisphere-specific processing resources?
… stimuli are presented in different visual hemifields as opposed to a single hemifield. A common interpretation of these findings is that each cortical hemisphere has an independent tank of processing resources and that overloading a single hemisphere leads to performance degradation. …
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An fMRI study of object recognition and cerebral laterality
… and within categories, at different visual hemifield locations (center, left and right hemifield). In the functional localizer experiment, opposite lateralization between words and (to a lesser degree) faces were observed. However, between-category univariate fMRI results were not …
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Intraparietal Regions Play A Material General Role In Working Memory: Evidence Supporting An Internal Attentional Role
… whereas EEG studies direct attention to a single hemifield and report a contralateral bias in both hemispheres. Here, we addressed this question by applying a regions-of-interest fMRI approach to elucidate IPS contributions to WM. Importantly, we manipulated stimulus type (verbal, visuospatial) …
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A Neuropsychological Investigation of Cerebral Dominance and Dyslexia
… to either the right or left visual hemifields, and tactually, stimuli can be presented to either the right or left hand. Since sensory inputs have been demonstrated to go directly from one hand or visual hemifield to the contralateral hemisphere, it can be determined which hemisphere …
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On the insufficiency of laterality-based accounts of face perception and corresponding visual field asymmetries
… for face recognition and a contralateral hemifield-hemisphere correspondence between the RH and the left visual field (LVF). The purpose of this set of experiments was to determine whether RH superiority for faces and contralateral hemifield-hemisphere correspondence is sufficient to …
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Variability of Neural Responses in the Lateral Prefrontal Cortex
… way? We also looked at possible effects of the hemifield of the response on variability. What we found was a modest effect of development on Fano factor during the cue epoch and a generally higher Fano factor for ipsilateral responses in adult monkeys. Task difficulty had no definitive effects …
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New objective and psychophysical techniques to study the processing of visual signals with emphasis on chromatic afterimages
… The measured pupil responses in the blind hemifield of patients with acquired cortical damage are either absent or of reduced amplitude when compared to those measured in the corresponding regions of the sighted field, whereas the patients with congenital loss of visual field show similar …
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Il ruolo del collicolo superiore nell'orientamento spaziale
… stronger for stimuli presented to the temporal hemifield than to the nasal hemifield. Taken together, these findings suggested that multisensory stimulation can be differentially effective depending on specific stimulus parameters. The Experiment 3 was aimed at verifying the role of the SC in …
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Colour constancy: human mechanisms and machine algorithms
… are the contribution of both sighted and blind hemifields to constancy for a subject with hemianopia. Contrary to the predictions of many of the current computational models, using unnatural illuminants has no substantial effect on the C index, nor does the size of the illuminant shift or the …
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Multifocal pupillographic objective perimetry in age-related maculopathy
… response impairment biased to the superior hemifield in early AMD subjects. Our results suggested that mfPOP may identify retinal dysfunction in eyes with preserved visual acuity and in the absence of clinically visible signs.
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Multifocal pupillographic objective perimetry in age-related maculopathy
… response impairment biased to the superior hemifield in early AMD subjects. Our results suggested that mfPOP may identify retinal dysfunction in eyes with preserved visual acuity and in the absence of clinically visible signs.
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Evaluating The Estimation of Neuronal Loss in Glaucoma
… and 45.93 ± 12.5° inferiorly at the optic disc. Hemifield GCIPL thickness has minimal correlation with corresponding sectoral RNFL areas either superiorly (r2 = 0.009, p=0.42) or inferiorly (r2 = 0.02, p=0.36). CONCLUSIONS: 1) Using rigorous methods for both OCT and histological quantification, …
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Alternative Neuropsychological and Magnetic Resonance Imaging Measures in Multiple Sclerosis: Exploring the relation between brain lesion measured by diffusion tensor magnetic resonance imaging and interhemispheric communication and processing speed in multiple sclerosis
… bilateral (left and right simultaneously) visual hemifield while the subject fixates to the middle of the screen. As soon as the subject detects a flash, he presses the response button with the left or right hand (detection task). An effect that is typically observed in healthy subjects is that …