New imagery shows brain neurons are arranged in 2D sheets

http://medicalxpress.com/news/2012-03-brain-wiring-no-brainer-scans-reveal.html?

by obtu • 14 years ago

62 8 14 years ago

rmundo• 14 years ago

So it's true what they say about the fabric of the mind. Consider mine blown!

obtu• 14 years ago

The article hasn't been liberated yet, but here's the abstract: https://www.sciencemag.org/content/335/6076/1628.abstract

A bit more on diffusion imaging, though you'll have to hit google scholar to find more up-to-date information on the signal processing:

http://www.metafilter.com/114373/What-a-beautiful-mind-you-h...

https://en.wikipedia.org/wiki/Diffusion_MRI

https://en.wikipedia.org/wiki/Tractography

username3• 14 years ago

Intelligent Design

nullflux• 14 years ago

So all this time Cray has been doing it right:

http://en.wikipedia.org/wiki/File:Cray-3_processor_brick.jpg

tocomment• 14 years ago

Does anyone know what they mean by a "grid"? Different neurons can have different numbers of connections and they connect all over the place, not just to their immediate neighbors.

I read and reread the first page of this paper and I can't figure out what they're saying. What's new here?

nooneelse• 14 years ago

I'm no domain expert, but I think by talking about individual neurons your comment is focused a bit too spatially small. The pathways described in the paper involve numerous axons hooking up widely separated neuron sets.

I.e. for a computer analogy, this isn't showing the scale of internal wiring for a chip, or even cables on the scale of hooking the motherboard to a hdd. It is showing the wiring on the scale of 'from one rack in a sever room to another across the room'. Or, for a highway analogy, not the housing subdivisions, more the freeways.

I just got answered over on reddit by someone who did a thesis on tractography; they seem to be open to more questions: http://www.reddit.com/r/science/comments/rl1y7/diffusion_spe...

Someone• 14 years ago

Supplemental data at http://www.sciencemag.org/content/suppl/2012/03/28/335.6076....

I haven't completely read it, but that data looks more noisy than that medical express link. That makes me trust it more. I (did?) wonder whether Science would do April fool's jokes, or whether the authors made a deal to do so, with the article itself being real.

ilaksh• 14 years ago

Sounds like what this guy was talking about a little. http://www.youtube.com/watch?v=48r-IeYOvG4

New imagery shows brain neurons are arranged in 2D sheets

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