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 16 of 16 for “"Visual pathways"”.
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ΜΕΛΕΤΗ ΤΩΝ ΟΠΤΙΚΩΝ ΠΡΟΚΛΗΤΩΝ ΔΥΝΑΜΙΚΩΝ ΣΤΙΣ ΑΜΦΙΒΛΗΣΤΡΟΕΙΔΟΠΑΘΕΙΕΣ
THE STUDY OF THE PATTERN REVERSAL VISUAL EVOKED POTENTIALS OF 44 PATIENTS WITH RETINOPATHIES, REVEALED THAT RETINAL DISEASES WHICH IS THE FIRST NEURON OF THE VISUAL PATHWAYS CAUSE DELAYED CONDUCTION VELOCITY OF THE P100.
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The effects of target vibration on the human contrast sensitivity function
… been conducted on the effects of vibration on visual acuity. The human contrast sensitivity function (CSF) has also been studied extensively as a predictor of visual performance under real-world conditions. However, no previous studies have combined the two lines of research and examined the …
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Pattern Reversal Chromatic VEPs like Onsets, are unaffected by Attentional Demand
Attention has been shown to modulate the visual evoked potential (VEP) recorded to reversing achromatic patterns. However, the chromatic onset VEP appears to be robust to attentional shifts. Functional magnetic resonance imaging (fMRI) responses to both chromatic and achromatic reversing patterns …
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The Development of Flash Visual Evoked Potential Techniques for the Diagnosis of Visual Disorders with Dense Opacities of the Optic Media
Visual evoked potentials (VEP)were recorded in a large normal population. Significant age differences were found, and the P2 component (latency 116 m.sec.) was the most consistent component of the VEP both between and within the individuals. The validity of the normal VEP criteria were tested in …
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Exercise-Induced Modulation of Early Visual Evoked Responses: Chromatic and Achromatic Pathways
… investigating exercise-induced modulations of visual responses have beenconstrained by (1) generalized stimuli that cannot distinguish global mechanisms from pathway- specific effects, (2) stimulus-directed tasks that may conflate exercise costs with attentional effects, and (3) traditional EEG …
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Filopodial Dynamics and Synapse Specification in the Drosophila Visual System
… on this overarching question using the complex visual processing circuitry of D. melanogaster. This system not only provides excellent genetic amenability but also a model where almost all connectivity can be built without environmental input, i.e. it is genetically hardwired. Nearly three …
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The Role of Early Recurrence in Improving Visual Representations
… the following four observations. 1) The primate visual system includes two main visual pathways: the dorsal pathway and the ventral pathway; 2) The two pathways respond to different visual features; 3) The neurons of the dorsal pathway conduct visual information faster than that of the neurons of …
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Evaluation of the visual pathway with ERG, mfERG and mfVEP in inherited eye disorders
… disorder with progressive loss of the central visual fields, which may in some patients remain unaffected for several decades. MfERG and mfVEP may be of clinical use in evaluating remaining visual function in these patients. Patients with dominant optic atrophy and a known mutation in the OPA-1 …
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A study of pupil response components in human vision
… clinical studies that involve assessment of the visual function. Pupil response components were investigated in normal subjects and in patients with damaged visual pathways. A series of experiments were carried out to investigate the pupil response to periodic modulation of several stimulation …
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A study of pupil response components in human vision
… clinical studies that involve assessment of the visual function. Pupil response components were investigated in normal subjects and in patients with damaged visual pathways. A series of experiments were carried out to investigate the pupil response to periodic modulation of several stimulation …
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The effects of selective attention on chromatic processing; pattern-onset VEP responses
… behavioral studies show that attention improves visual processing. Studies of chromatic steady-state and pattern-reversal visual evoked potentials (VEPs) support this. Typically in these studies VEP stimuli are displayed at one spatial location while distracter stimuli are displayed at a …
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Spatial properties of photophobia
… study provides data that are suggestive of the pathways that gives rise to the photophobia response. A close correspondence was found between the degree of spatial summation determined for photophobia and the dendritic area of two kinds of retinal ganglion cell, parasol and small bistratified. …
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Into the Wild: Deploying Brain and Physiological Sensing in Natural Environments to Enhance Wake and Sleep Cognitive Behavioral Studies
… of vision to evaluate retinal and early afferent visual pathways. The second contribution of this dissertation is the Fascia Ecosystem, which reinvents sleep studies using three key technologies. First, the Fascia Sleep Mask uses fabric-based sensing to collect polysomnogram-like data in a soft …
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Human spatial orientation perceptions during simulated lunar landing
… direct manual control. However, vestibular and visual sensorimotor limitations unique to lunar landing may interfere with landing performance and safety. Vehicle motion profiles of candidate lunar descent trajectories were used as inputs to a mathematical model for orientation system function, …
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The Genomics of Divergence and Adaptation in Sister Reef Fishes Separated by the Isthmus of Panamá
… the molecular basis of adaptation in the visual system to the contrasting visual environments of the Tropical Eastern Pacific (TEP) and Caribbean. I compiled de novo transcriptomes of the retina and investigated expression and coding sequence changes in opsin genes and expression changes …