Search for dissertations about: "Stimulus extent"
Showing result 1 - 5 of 34 swedish dissertations containing the words Stimulus extent.
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1. Vision Beyond the Fovea: Evaluation and Stimuli Properties
Abstract : This research is about evaluating vision in the periphery. Peripheral vision is of fundamental importance in the performance of our everyday activities. The aim of this thesis is to develop methods suitable for the evaluation of peripheral vision and to assess how different visual functions vary across the visual field. READ MORE
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2. Chemical and stimulus-induced NMDA-dependent plasticity and the possible involved mechanisms
Abstract : Long-term potentiation (LTP) and long-term depression (LTD) are considered as the most important forms of synaptic plasticity involved in learning and memory. The traditional way to induce LTP and LTD is by electric stimulation leading to activation of NMDA-R. READ MORE
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3. The direct current electroretinogram and the standing potential of the rabbit under different stimulus and adapting conditions
Abstract : The electroretinograrn (ERG) reflects the summation of electrical responses generated by neurons and non-neuronal cells in the retina and pigment epithelium in response to light. The major ERG components are the fast, negative a-wave, the fast, positive b-wave and the slow, positive c-wave. READ MORE
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4. Analysis and development of strategies for magnetic resonance functional neuroimaging
Abstract : This thesis focuses on strategies for oxygenation-sensitive MRI that are designed to measure alterations in brain physiology induced by changes in neuronal activity. In a first study, it was shown that the temporal evolution of BOLD MRI signal changes in response to both brief and sustained visual activation are equally well visible in FLASH and EPI recordings. READ MORE
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5. Functional neuroimaging of dual task interference and divided attention
Abstract : It is known that human subjects cannot perform two reaction time (RT) tasks as efficiently as they would perform the constituent tasks individually. Increments of reaction times or error rates that occur when two RT tasks are performed nearly simultaneously is known as interference. READ MORE