BTW check out supplementary video 1 to see the DAP firings correlated with extracellular LFP! We've been missing these little suckers all along!
http://science.sciencemag.org/content/suppl/2017/03/08/science.aaj1497.DC1 Q. "What is it like to BE a huge mass of 10^14 DAP all spatially arranged?" Maybe it's like .... consciousness? cheers colin On Tue, Mar 14, 2017 at 1:11 PM, Colin Hales <[email protected]> wrote: > Hi, > > Over the last 15 years, every 3 years or so we get yet another paper that > takes us all towards the centralisation of brain signalling on the EM > fields. Not _away_ from such an idea. _Towards_ that idea. > > This is merely the latest in that long vector towards EM fields as central > to brain operation. > > ============================================ > Moore, J.J., Ravassard, P.M., Ho, D., Acharya, L., Kees, A.L., Vuong, C., > and Mehta, M.R. (2017). Dynamics of cortical dendritic membrane potential > and spikes in freely behaving rats. Science. > earlier Arxiv version > http://biorxiv.org/content/early/2016/12/28/096941 > > See http://science.sciencemag.org/content/early/2017/03/08/science.aaj1497 > and commentary > "Why our brains may be 100 times more powerful than believed" > here: http://newatlas.com/brains-more-powerful/48357/ > ==================================================== > > Guess what?: 'Dendritic Action Potentials' (DAP) must now become a thing. > All your simulation packages? Just got old. All your neuromorphic chips? > Has-beens. > > SOMATIC AP is 60 years old. > DENDRITIC AP now comes home. > > Neocortical sub- and suprathreshold dendritic membrane potential (DMP) > breaking out into localised firing within the dendrite structure. Dendrite > firing has been observed for a long time, but this is the first time anyone > has seriously accessed its origins and correlated it with behaviour. > Collectively the DMP are very strong (as represented by voltage measured in > tissue: Higher than somatic action potentials!) This is because neural > tissue is 90% dendritic and there are collosal numbers of post-synaptic > densities (synapses). > > The implication ... you guessed it .... the brain is not a computer > (analog or digital) but a system of interacting fields who's long-distance > outward signs ... the tip of the iceberg ... are soma-related action > potentials. I reckon it's at least 3 orders of magnitude more complex, not > just two....because it's totally spatialised and interacting at distance at > near the speed of light. > > It is physically impossible for any signals to operate chemically > (ion-channel ion transport leading to extracellular ion motion = currents) > on the fast timescales found to actually operate in the dendrites. Ions can > barely move a nanometer on those timescales. There are NO currents at all! > No current can possibly be the origin of collective signalling of this kind. > > The fields? No problem. Action at a distance. Speed of light. > Remotely-activated modulation of remote transmembrane fields (in this case > the post-synaptic density of ion channels, advancing and retarding signal > events). Easy. Plain old classical physics of the Lorentz force. Field > systems exactly of the kind I did in my PHD thesis. > > And exactly the same thing in my chip design ... what I am experimentally > working on already ... my proposed system does this naturally. This is > because I have no neurons in my design. I merely have loci of signalling > that does the same thing dendrites/soma/axons do. > > This seems like a big deal to me. Is that 'ol penny gonna drop this time? > How much evidence can a system ignore before it goes bang and shifts. > (Reminds me of a certain political context ... let's not go there) :-) > > Back to testing. > > cheers > > colin > > ------------------------------------------- AGI Archives: https://www.listbox.com/member/archive/303/=now RSS Feed: https://www.listbox.com/member/archive/rss/303/21088071-f452e424 Modify Your Subscription: https://www.listbox.com/member/?member_id=21088071&id_secret=21088071-58d57657 Powered by Listbox: http://www.listbox.com
