Can Brain scans reveal what you've seen?
September 26th 2009 22:26
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From: CNN By Brandon Keim
Having modeled how images are represented in the brain, the researchers translated recorded patterns of neural activity into pictures of what test subjects had seen.
To construct their model, the researchers used an fMRI machine, which measures blood flow through the brain, to track neural activity in three people as they looked at pictures of everyday settings and objects.
The researchers' fMRI readings bundled the output of millions of neurons into single output blocks. "At the finer level, there is a ton of information. We just don't have a way to tap into that without opening the skull and accessing it directly," said Tong.
Gallant hopes to develop methods of interpreting other types of brain activity measurement, such as optical laser scans or EEG readings.
He mentioned medical communication devices as a possible application, and computer programs for which visual thinking makes sense -- CAD-CAM or Photoshop, straight from the brain.
Such applications are decades away, but "you could use algorithms like this to decode other things than vision," said Gallant. "In theory, you could analyze internal speech. You could have someone talk to themselves, and have it come out in a machine
link here to the full text of the article - just click here - I've only given you a little bit, but it seems to suggest more than it delivers, what do you think?
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