Blindsight

Marie toshrimpNOtoSPAM at hotmail.com.invalid
Sat Apr 8 09:06:11 EST 2000


Hi again,

Thanks for your input.  I will get back to this later.
In article <8cct0g$e7t$1 at pump1.york.ac.uk>, "Pam Blundell"
<pjw106 at york.ac.uk> wrote:
>"Marie" <toshrimpNOtoSPAM at hotmail.com.invalid> wrote in message
>news:00f23a03.e9adb180 at usw-ex0102-015.remarq.com...
>> Hi Pam,
>>
>> Thanks for your respons.  Yes, I realised that I did a
mistake in
>> my text with regard to neglect.  Due to neglect I guess!!! :)
>>
>> I have the Parking book, but what I don't seem to get to get a
>> grip around is whether blindsight is a condition or a result
of
>> hemianopia.  SOmeitmes they are writing about blindsight as if
>> that is a separate condition from hemianopia, but surely
>> blindsight is a consequence of hemianopia!?
>Hemianopia can be a result of damage to several different
processing areas.
>Blindsight will arise if the damage is in later processing
areas.  If (for
>example) the thalamus (LGN) is damaged, I don't think you would
necc. get
>blindsight, as this is before the separation of the visual
pathways.
>Similarly, you can get blindsight with complete blindness, not
just
>hemianopia, or with scotoma (small areas of blindness).
>
>The two conditions, while they do sometimes co-occur, each one
is neither
>necc. or sufficient to cause the other.
>
>Theres an interesting classic paper by goodale and milner
(1992) in Trends
>in Neurosciences that would be worth tracking down (its in the
back of the
>Ellis and Young book I cited in my last posting), that talks
about the
>differences between two pathways of visual processing, and is
relevant to
>this discussion.
>
>Pam.
>
>
>
>
>


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