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 20 of 28 for “"VEP"”.
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Top-down Modulation of the Chromatic VEP with Hypnotic Suggestion
… of achromatic stimuli. Visual evoked potentials (VEPs) recorded under such conditions agree with this pattern of activation when elicited by purely achromatic grating stimuli. However, when stimuli were chosen to preferentially activate the S-(L+M) or L-M chromatically opponent pathways, no …
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The effects of selective attention on chromatic processing; pattern-onset VEP responses
… 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 different spatial location. Waveform characteristics are shown to be attenuated when the VEP is unattended. …
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Characterisation of Ovine and Human Vertebral Endplates using X-ray Microtomography: the Effects of Degeneration on Structure.
… evidence indicating that the vertebral endplate (VEP) plays a major role in low back pain. The VEP balances two conflicting biophysical functions: providing both a nutritional pathway and mechanical support to the disc, therefore making it prone to damage. However, the VEP is still poorly …
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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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The mouse visually evoked potential : neural correlates and functional applications
The visually evoked potential (VEP) is a local field potential (LFP) evoked in visual cortex in response to visual stimuli. Unlike extracellular single unit recordings, which allow us to probe the function of single spiking cells acutely, the chronic VEP technique gives us insight into ensemble …
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Visual Evoked Potential Measures of Blur Adaptation
… the measurement of the visual evoked potential (VEP). VEP measurements were taken over time as subjects were exposed to a reversing sine-wave grating both with blur and with blur adaptation. The VEP measurement gave insight about the visual acuity, which can be used to interpret the behavior of …
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Visual Outcome Measures of Remyelination and Neuroprotection in Multiple Sclerosis
… exist. These include visual evoked potentials (VEP), optical coherence tomography (OCT), visual acuity and colour vision. It remains unclear which visual outcome measure, if any, is best suited for assessment of remyelination and neuroprotection for use in MS research and clinical trials of …
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Untersuchungen zur räumlichen Tiefenwahrnehmung mit Visuell Evozierten Potentialen
… zusammenfassen: Mittels Ableitung aller VEPs über zwei Referenzelektroden war es einerseits möglich, bei einer Ableitung über Oz-Fpz Antworten großer Amplitudenhöhe zu erhalten. Durch eine Verbesserung des Signal-Rausch-Verhältnisses wurden andererseits über Oz-Pz auch noch bei geringer …
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Die Bestimmung visuell evozierter Potentiale bei Kindern
… ihre Reproduzierbarkeit und untersuchten, ob das VEP bei Kindern unter klinischen Routinebedingungen in unserem Labor eingesetzt werden kann. Wir entwarfen dazu eine Bildergeschichte, die zur Ablenkung während der Meßvorbereitungen dient und die Kinder auf die Meßbedingungen einstimmt. Zusätzlich …
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Pattern Reversal Chromatic VEPs like Onsets, are unaffected by Attentional Demand
… 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 are also affected …
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A novel method to determine a national diesel emissions inventory
… recent South African Vehicle Emissions Project (VEP), a national programme commissioned by the Department of Minerals and Energy that was completed at the end of 1998. The engine sample for the tests was made up entirely of engines manufactured by Atlantis Diesel Engines (ADE) under licence from …
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Therapists and their patients: Similarities and differences in attitudes between four psychotherapy orientations in Sweden
… Data was collected by a questionnaire named VEP-Q. Similarities and differences in attitudes between psychotherapists of four different orientations - working with adults in individual therapy - were surveyed. 416 therapists with an identity as either a psychodynamic (PDT), a cognitive (CT), …
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Signal identification for visual electrophysiological recordings. A comparison of signal analysis techniques and their application to clinical electrophysiology of vision.
… (mfERG) and visual evoked potential (VEP) recordings. To simulate the types of signal identification problems encountered in the clinical environment, recordings were performed on healthy volunteers then artificially modified to represent the effects of disease. A multivariate …
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Passive experience-dependent plasticity in mouse primary visual cortex
… for the tracking of visually evoked potentials (VEPs) in response to phase-reversing sinusoidal grating stimuli. As a given visual stimulus becomes familiar to the mouse, the VEP magnitude increases. This increase in VEP magnitude is highly selective to stimulus features, such as the orientation, …
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The exploratory study of psychological experiences of female victims of gender-based violence in Sekhukhune District Municipality
… the Victim Empowerment programs Centers (VEP) implements support to victims and survivors of crimes including gender-based violence, as well as their families to deal with the impact of the incident which he/she has experience. VEP also assist victims with management of trauma and ensuring …
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The exploratory study of psychological experiences of female victims of gender-based violence in Sekhukhune District Municipality
… the Victim Empowerment programs Centers (VEP) implements support to victims and survivors of crimes including gender-based violence, as well as their families to deal with the impact of the incident which he/she has experience. VEP also assist victims with management of trauma and ensuring …
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Counselling survivors of crime: the psychological impact on volunteers
… as part of the Victim Empowerment Programme (VEP). A qualitative, multiple case study research design was employed. Semi-structured interviews were conducted with 12 Cape Town based participants who are volunteer counsellors of the VEP. The data were analysed using thematic analysis. While the …
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An electrophysiological study of chromatic processing in the human visual system. Using visual evoked potentials and electroretinograms to study cortical and retinal contributions to human trichromatic vision.
… was examined using visual evoked potentials (VEPs). These responses were elicited by chromatic spot stimuli, which were manipulated in order to selectively activate the chromatic processing system. Chromatic processing at the retinal level was examined using the electroretinograms (ERGs) for …
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An electrophysiological study of chromatic processing in the human visual system. Using visual evoked potentials and electroretinograms to study cortical and retinal contributions to human trichromatic vision.
… was examined using visual evoked potentials (VEPs). These responses were elicited by chromatic spot stimuli, which were manipulated in order to selectively activate the chromatic processing system. Chromatic processing at the retinal level was examined using the electroretinograms (ERGs) for …
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