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Illusion - Is Seeing Really Believing?
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Illusion - Is Seeing Really Believing (1998)(Marshall Media)[Mac-PC].iso
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00071_Field_frep26.txt
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1996-12-30
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TOPOGRAPHIC REPRESENTATION
A microscopic cross-sectional
view of the optic nerve where it
leaves the eye, interrupting the
retinal layers shown at the left
and right. The full width of the
picture is about 2 millimeters.
The clear area at the top is the
inside of the eye. The retinal
layers, from the top down, are
optic-nerve fibers (clear), the
three stained layers of cells,
and the black layer of melanin
pigment.
Even before further research
became possible, we were not
completely ignorant about the
parts of the brain involved in
vision: the geography of the
preliminary stages was already
well mapped out (see the
illustration to follow). We knew
that the optic-nerve fibers
make synapses with cells in the
lateral geniculate body and that
the axons of lateral geniculate
cells terminate in the primary
visual cortex.