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 6 of 6 for “"Spatial Summation"”.
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Spatial summation in the dark-adapted fovea
… threshold, and the extent and strategy of spatial summation in the dark-adapted fovea. Appearance reports were also monitored to investigate the relationship between detection and perception. Methods: 1) Absolute thresholds for small (~1' full width at half maximum – FWHM, and 27' …
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An Analysis of Spatial Summation in the Receptive Fields of Goldfish Retinal Ganglion Cells
… aspect of retinal processing is considered--the spatial interactions within either the center or the surround of the receptive field of the ganglion cell. A generalized model for this restricted processing is proposed: the independent signals in each of two separately stimulated areas may undergo …
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Neuronal Processes Underlying Spatial Summation of Heat Sensations Investigated by Functional Magnetic Resonance Imaging of the Entire Central Nervous System
… pain experience, altering one’s pain perception. Spatial summation is the term used to describe this phenomenon, and is characterized by an increase in pain perception, or a decrease in pain threshold, when the affected surface area is increased. This project investigated the neuronal processes …
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Spatial properties of photophobia
… the same subjects' psychophysically-determined spatial distributions of macular pigment, to examine in detail the attenuation of photophobia by macular pigment. Results indicate that the photophobia response is preferentially biased to prevent the fovea from exposure to potentially damaging …
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AREA-INTENSITY RELATIONSHIPS AND BRIGHTNESS
… in the size of a test stimulus is termed spatial (areal) summation. The aim of the present research is to quantify spatial summation effects for a large range of stimulus sizes at two suprathreshold luminance levels and two stimulus presentation methods (binocular and haploscopic). Two …
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Layer specific differences in the mouse auditory corticocollicular system
… layer 6 corticocollicular recordings, cells show spatial differences in their respective input maps. Layer 5 corticocollicular neurons were shown to receive inputs coming from various layers compared to layer 6 corticocollicular neurons which almost exclusively receives input from layer 6. …