Vision, Multimodal Integration & Plasticity
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9 Terms
What do rods and cones detect?
Rods: low light, no color; Cones: color and detail, concentrated in fovea.
Describe optic chiasm crossing.
Nasal fibers cross; temporal fibers stay ipsilateral—ensures contralateral field processing.
What is retinotopy?
Continuous spatial mapping from retina to V1 and higher visual areas.
What does V4 process?
Color and shape; lesions cause achromatopsia.
What does V5/MT process?
Motion and direction; lesions cause akinetopsia.
What is multimodal perception?
Integration of multiple senses for coherent experience.
Give examples of multimodal illusions.
McGurk effect, Rubber Hand illusion.
What is synesthesia?
Stable blending of senses (e.g., color-grapheme); linked to increased connectivity in STS and V4.
How does sensory deprivation affect cortex?
Unused cortical regions taken over by other senses; shows cross-modal plasticity.
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