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| quote: | Originally posted by est
Yup - people who have had the occipital lobe removed/damaged still respond subconciously to visual stimuli. They have no awareness of what they've seen, but visual phenomena (such as fear conditioning) still occur. Scans show that subcortical areas are acivated. This means that there are visual pathways buried deep in the brain (much deeper than the relatively recently evolved occipital lobe) that bypass the occipital lobe and communicate with other brain areas, despite no concious knowledge of the percepts. Everyone, including seemingly blind people do this. It's called blindsight and admittedly has nothing to do with dreams but I just think its pretty cool. |
yea if your occipial lobe is removed you will still have....hehe, hoe I spell this right, Lateral Geniculate Nucleus (LGN) activity. This is where the opponent process theory of color vision takes place. It off on the side of the hypothalamus, so it is subcortical.
The thing about vision that amazes me is that 70 -80% (I think I got those numbers right) of what we see, is based off communicatino from the occipital lobe to the LGN, meaning, your brain is just going off old info for the most part.
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