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They hope to create a computer model of these connections in the future

Researchers from the University College London (UCL) in Britain have started to map the functions and connections between nerve cells in the brain, bringing them closer to creating a computer model of the body's most complex organ. 

Tom Mrsic-Flogel, study leader from the University College London, and a team of researchers, have begun to "untangle" the complex inner workings of the brain by sorting through individual connections and functions of nerve cells.

Mapping the brain's functions has been a challenging task that some scientists around the world are in the midst of attempting. For instance, Harvard researchers are creating a 3-D nanoscale model of neural circuits that shows individual connections in the neural network. Others have even started to map other information processing centers in the body, such as the spinal cord.

The task is challenging mainly because there are around 100 billion neurons in the brain, and each one is connected to thousands of other nerve cells. 

Now, researchers from UCL are making their own contribution to the cause through high resolution imaging of the visual cortex of a mouse brain. They chose this particular area because it contains thousands of neurons and millions of connections.

Mrsic-Flogel and his team used high resolution imaging to see which neurons in this area responded to a specific stimulus. Then, they sliced a portion of this tissue and added "small currents of subsets of neurons" in order to see which neurons would send electrical or chemical signals to one another. They repeated this technique over and over again until they could trace the connections and functions of these nerve cells. 

"Once we understand the function and connectivity of nerve cells spanning different layers of the brain, we can begin to develop a computer simulation of how this remarkable organ works," said Mrsic-Flogel. 

By understanding connections in the brain, the researchers hope to see how they deviate in those who have Alzheimer's, stroke and schizophrenia. But Mrsic-Flogel said it would take many years to make the computer model needed to understand these connections. 


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Software brain?
By Jeremy87 on 4/11/2011 11:53:48 AM , Rating: 2
I've always thought it weird that if in the future we built human robots, they would be able to think "I'm a machine".
Now, what about "I'm only a software simulation run by a bigger machine".




RE: Software brain?
By amanojaku on 4/11/2011 1:31:58 PM , Rating: 1
If the software brain is anything like the human brain those "who am I?" and "why am I here?" questions will be the last things on its mind. It'll be more concerned with the next code merge, whether or not it can afford a new API, and can it push off garbage collection for another week.


RE: Software brain?
By ipay on 4/11/2011 1:35:31 PM , Rating: 2
quote:
I've always thought it weird that if in the future we built human robots, they would be able to think "I'm a machine". Now, what about "I'm only a software simulation run by a bigger machine".

Actually, they will think "You're only human".

You are a bunch of sophisticated nerve cells, built in a special order (at least as contemporary science goes), but you still look at yourself as if you are something different, because you don't feel like a bunch of cells.
So what is the right view? The outside perspective or the qualia the machinery originates?


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