PSYB51H3 Study Guide - Visual Cortex, Visual Acuity, Spatial Frequency

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29 Mar 2014
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Chapter 3 spatial vision: from spots to. Acuity for low-contrast stripes: what happens if the contrast of the stripes is reduced, otto schade. Topography of the human cortex: most of what we know comes from physiological studies on animals, fmri measures the changes in blood oxygen level that reflect neural activity, reflect a range of metabolically demanding neural signals. Receptive fields in the striate cortex: hubel and wiesel, receptive fields of striate cortex neurons are not circular elongated, respond much more vigorously to bars, lines, edges, and gratings than to round spots of light. Simple and complex cells: simple cells, neurons that have clearly defined excitatory and inhibitory regions, edge detector prefers to see light on one side of its receptive field and darkness on the other. Subclasses of the simple and complex cells: idiosyncrasies in the receptive fields of striate cortex neurons, size of a particular cell"s receptive field appears to vary with target con- trast.

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