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Unformatted text preview: tinal interneurons located in the inner nuclear layer that integrate signals from across the surface of the retina"
amacrine cellsÂ ,"retinal interneuron in the inner nuclear layer that integrates signals across adjacent segments of the retina"
photopic visionÂ ,"the ability to perceive visual stimuli under bright light conditions due to the activity of cones
--active in bright light, color info, excellent quality, three types"
scotopic vision,"the ability to perceive visual stimuli in near darkness due to the activity of rods
--active in dim light, monochromatic info, poor quality, one type"
spectral sensitivity of the cones and rods,"null"
Purkinje effect,"T he tendency for the peak luminance sensitivity of the human eye to shift toward the blue end of the color spectrum at low illumination levels. For instance, blue appears brighter on flowers than red or yellow under dim light."
visual receptive field,"a location on the retina at which light affects the activity of particular visual interneuron"
on-center receptive fields,"Receptive field located in the center of the retina. If a light is shined on this field, the bipolar cell interneuron will depolarize, generating many action potentials"
off-center receptive fields,"Receptive field that surrounds the on-center receptive field. If a light is shined on this field, the bipolar cell interneuron will hyperpolarize, generating few action potentials. However, if a light is shined on both fields, they will cancel each other out"
how can the properties of receptive fields explain the illusion of the Hermann grid?,"null"
Fundamentally what are receptive fields sensitive to?,"light"
why are their properties important for survival?,"null"
flow of information from retina to the brain,"retina --- diencephalon (thalamus) --- telencephalon (primary visual cortex)
Â Â Â Â Â --- mesencephalon (super colliculus) mesencephalon = unconscious vision, important for eye movements, may explain blindsight
retina - diencephalon - telencephalon = conscious vision"
what part of the visual scene does each eye see?,"all of it"
what part of the visual scene does each cerebral hemisphere initially see?,"receives info from both sides but only sees half of the image"
Be able to explain the projection of the visual image in the retinas and in the cerebral hemispheres (the "arrow figure"),"null"
which part of the visual image would each cerebral hemisphere see if lenses did not invert the image projected onto the retinas?,"null"
if the person becomes blind to the left side of the visual field, where is the damage most likely located?,"right hemisphere"
ocular dominance columns,"column of cortexx perpendicular to the cortical surface that responds to input from either the right or the left eye, but not to both"
orientation columns,"a column of primary visual corte that responds to lines of a single angle"
dorsal ("where") stream,"pathway leading from the primary visual cortex in a dorsal direction thought to participate in perception of movement
goes to the parietal lobe and is concerned with location, dimensions, space, etc."
ventral ("what") stream,"pathway of info fro...
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This document was uploaded on 03/17/2014 for the course PSY 3 at UCSB.
- Fall '10