Le cerveau et la réalité
Publié : 05 avr. 2004, 14:35
http://www.nature.com/nsu/031027/031027-5.html:
>Brain fakes it
>Nerve-cell activity when eyes are shut reveals internal views of the
>world.
>30 October 2003
>TANGUY CHOUARD
>
>People's tendency to see what they expect to see may be caused by
>their brain constantly generating virtual sensations. So suggests a new
>study of sleeping cats1.
>...
>Like a detuned television screen flashing up occasional pictures, the
>resting cortex spontaneously produces clear maps of the outside world.
>It is as if the eyes were actually looking at objects.
>
>This is not dreaming. Because it happens so low in the normal
>information processing chain, it is almost as if the mental images had
>sprung right in front of the eyes.
>
>The meaning of these internal states remains unclear. They might
>reflect memories, expectations or items most worthy of attention.
>
>If the same is true for humans, these virtual scenes might even
>represent our brain's best guess of what our surroundings should look
>like at any given time. Sensory stimulation might then update such
>preconceptions - provided that we open our eyes.
Voilà: dans cet article, on ne confond pas chose perçue et chose réelle.
>Brain fakes it
>Nerve-cell activity when eyes are shut reveals internal views of the
>world.
>30 October 2003
>TANGUY CHOUARD
>
>People's tendency to see what they expect to see may be caused by
>their brain constantly generating virtual sensations. So suggests a new
>study of sleeping cats1.
>...
>Like a detuned television screen flashing up occasional pictures, the
>resting cortex spontaneously produces clear maps of the outside world.
>It is as if the eyes were actually looking at objects.
>
>This is not dreaming. Because it happens so low in the normal
>information processing chain, it is almost as if the mental images had
>sprung right in front of the eyes.
>
>The meaning of these internal states remains unclear. They might
>reflect memories, expectations or items most worthy of attention.
>
>If the same is true for humans, these virtual scenes might even
>represent our brain's best guess of what our surroundings should look
>like at any given time. Sensory stimulation might then update such
>preconceptions - provided that we open our eyes.
Voilà: dans cet article, on ne confond pas chose perçue et chose réelle.
