A Thinking
Pedagogy
Blindsight
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A Thinking
Pedagogy |
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So you think you have 5 senses: Think again! In art classes teachers often say that there is a difference between seeing and looking. . . . . . and they are right.
The left visual cortex is an important nueral processing
region for the right eye and the the right visual cortex does much
of the processing of the left eye. Recent discoveries have been
made that show we have an additional visual "centre" in
our brains other that the left and right visual cortex. The optic
nerve splits and heads off to these two separate activity regions.
This was discovered by Larry Weiscrantz and Alan
Cowley when a patient whose right visual cortex was damaged and
hence he could not see using his right eye came to them for possible
treatment. The left eye was fully functional but the right visual
cortex of the brain could not process the signals, and hence he
could not "see" from this eye. The patient was asked to point to an object with
his finger in a region outside the sphere of vision of the remaining
good eye. The patient and the doctor were both stunned when the
patient could accurately identify the location of the object 99%
of the time, without being able to see it. The experiment has been
repeated many times on numerous subjects and is known as blindsight
syndrome. Somehow the eye is sending information about the placement
of the invisible object to another part of the brain.
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