Visual Systems Flashcards
Rods allow you to see
in low light; night vision
Cones are more sensitive to
bright light, they allow us to perceive color
which pathway processes info about depth and motion?
Magnocellular (rods)
Form and color are processed by the
parvocellular pathway (cones)
The fovea is a region in the _____ of the retina and has a ____ concentration of ______
middle, high, cones
describe lateral inhibition and where does it take place?
It takes place in between receptor cells and ganglion cells (middle layer), it is a mechanism of signal enhancing which inhibits low firing neurons, thus enhancing contrast of signaling
what is cortical magnification?
the phenomenon in which areas of the brain that have high activity get a larger cortical representation (ex . a piano player would have a larger hand/finger region in their motor strip than an average person)
The majority of visual input travels along this pathway
Rentino-geniculate path
what is the geniculo-cortial pathway
goes from LGN to v1 via optic radiations
which part of the retina has the largest cortical magnification?
the fovea
what is a cortical column?
a topographically organized/similar group of neurons that respond to various orientations of an object… this is the basis of “edge detection”
The inferior longitudinal fasciculus is aka
the ventral stream, white matter which travels from v1 to temporal lobe
the superior longitudinal fasciculus is aka
the dorsal stream, white matter projections from v1 to parietal lobe
which pathway is unconscious perception
where/how aka dorsal stream
object recognition is a(n) _____ process
concious
