Visual Data Decrease from V1 onwards absorbed?

Discussion in 'Optometry Archives' started by Luwe, Sep 13, 2009.

  1. Luwe

    Luwe Guest

    Hi,

    When visual streams pass thru the visual cortex areas like
    V1, V2, V3, V4 and so on. Do the data stream decrease after
    passing each stage? For example, after passing thru the edge
    and form detector or motion or color detector of particular
    visual cortex area, are the neural streams for those respective
    edge, form, color detection absorbed in those cortex parts
    and the visual streams reaching the latter parts like V19
    become smaller?? Or are the visual data streams constant
    all the way to the prefrontal cortex for thought processing? Thanks.

    Luwe
     
    Luwe, Sep 13, 2009
    #1
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  2. Luwe

    Luwe Guest

    In simple words, does each functional module like V2, V3, etc.
    attenuate the signals of the visual streams after passing
    thru each of them and triggering the firing their neurons
    (involved in say edge detection, form, color detection, etc.)?

    Luwe
     
    Luwe, Sep 13, 2009
    #2
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  3. Luwe

    Dr Judy Guest

    The vision input is not linear but more like a network. Input may go
    to the various areas at the same time, not one after the other. Some
    of the areas influence one another, some don't.

    Judy
     
    Dr Judy, Sep 13, 2009
    #3
  4. Luwe

    Luwe Guest

    What do you think bind the edge, motion and color detectors as
    a unity? Whatever it is that bind them. If you can tap it with
    an electronic and the right frequency, then you can superimpose
    video images into our brain such that it can feel indistinguisable
    from reality?

    Lu
     
    Luwe, Sep 13, 2009
    #4
  5. Luwe

    Dr Judy Guest

    Some of the motion, edge and colour detection happens in the retina.
    Some happen at various other locations in the brain.

    Not sure what you mean by putting video images into the brain; the
    brain won't respond to video feed, it responds to the electrical input
    from the eyes which watch the video feed.

    Three-D movies and videos, especially some of the sophisticated
    amusement park rides with moving chairs are pretty good now at
    simulating reality without any direct input to the brain.

    Judy
     
    Dr Judy, Sep 14, 2009
    #5
  6. Luwe

    Edward Guest

    Persinger can put signal into the temporal lobe by magnetic
    field and cause people to experience live hallucinations. I
    wonder if someone has experimented on ejecting images
    into the visual cortex so you can see stuff superimposed
    on your visual field that is indistinguisable from reality
    such that you can't tell them apart. They just have to figure
    out the right signal strength and frequency. Rodolfo Llinas said
    40 Hz bind the brain, so if we can use a 40 hertz magnetic
    field tuned to the neurons strength then we can maybe inject
    any live feed into the brain. I wonder what is the latest
    in this field.

    Lu
     
    Edward, Sep 15, 2009
    #6
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