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any neurobiologists / physicists here to help?	by kit1685	2008-05-05 14:03:40
Hi everyone, my question is regarding color. I am studying for an exam, and I couldn't find information on this in my notes. My question is about neurons in the Area V4 in the ventral processing stream of the visual pathway - but in general about color perception. In my script it says that neurons in V4 (unlike the blobs in V1) don't respond to the wavelength that is reflected from a surface - but to the color of it. It states that if the neuron is tuned to respond to green, it will respond to a green surface even if it is illuminated with red light, and therefore reflects the wavelength of red. I absolutely do not get this concept - I thought that there is no such thing as a "color of the surface" - because the color is only put together in our visual pathways by examining the wavelength. Now it says here that the reflected wavelength does not matter? Well what do these cells measure then? How do they know the surface is green and not red? There is probably some physical concept I am just not getting. Little help please...
[ Reply ]
The way I read that:	by Esteis	2008-05-05 14:15:58
prior knowledge	by kit1685	2008-05-05 14:27:28
Taking a swing at this...	by zelda	2008-05-05 14:26:07
Sounds good, and in addition	by run.dll	2008-05-05 14:34:27
i am just wondering,	by kit1685	2008-05-05 14:37:17
Perhaps it makes use of peripheral information.	by run.dll	2008-05-05 14:43:58
You're right..	by binkley	2008-05-05 14:45:47
well I am getting tired...	by kit1685	2008-05-05 14:59:54

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