So... which drugs stimulate the mediodorsal thalamus? Maybe I have taken them accidentally before. I've sampled just about anything.
On Thu, 1 Aug 2019 at 18:49, Alan Grimes via AGI <[email protected]> wrote: > The cortical algorithm is interesting. Cortical columns are pretty sexy > too because they're an obvious target for finding a high level algorithm > that does the same or better. > > But regardless of how you implement cortex, the next thing you MUST do > to achieve a full functioning mind is to implement the actual structure > for sequential thought, not just a logic network (like a deep learning > model), but actual sequential thinking. It also seems that the brain can > do basic task switching, in that multiple symbols can be fit into the > pipeline and operate in sequence.?? I think the synchronization and > buffering is done by the basal ganglia. > > In the brain, that structure is the Cortico-thalamo-Cortical loop. Any > functioning AGI architecture will have something similar. > > There are several things going on, one is basic feedback, ie feedback > applied to an input circuit will squelch out parts of the input that the > brain has already perceived so that new information is highlighted. > > Sometimes brain regions generate activity spontaneously and information > is encoded by inhibiting some of those spontaneous signals. So yeah, > there is a lot of information to grok but it's all important if you want > to sucessfully make a functioning AGI. > > Another thing is disinhibition, where a brain region might have > inhibitory projections but if it, itself, is inhibited, that is removing > that inhibition to the ultimate target, so it becomes disinhibited and > available to either spontaneous firing or stimulated firing. > > (many neurons have a base rate of spontaneous firing that can either be > excited or inhibited.) > > Quote from page on Thalamus linked below: > Recent research suggests that the mediodorsal thalamus may play a > broader role in cognition. Specifically, the mediodorsal thalamus may > "amplify the connectivity (signaling strength) of just the circuits in > the cortex appropriate for the current context and thereby contribute to > the flexibility (of the mammalian brain) to make complex decisions by > wiring the many associations on which decisions depend into weakly > connected cortical circuits."[31] Researchers founds that "enhancing MD > activity magnified the ability of mice to ???think,???[31] driving down by > more than 25 percent their error rate in deciding which conflicting > sensory stimuli to follow to find the reward." [32] > > REALLY?!??!!??!???? YOU THINK?!??!?!!?? I mean like wow, you must be like > Sherlock Holms and Albert Einstein rolled together, I mean who would > have thought a piece of anatomy that was basically wired into just about > every part of the brain and was part of the major signal/information > flows into and through the brain could have such a role!!!! > > Seriously though, this is how the brain selects which networks it needs > to accomplish specific functions and implements multiple behaviors (ie > general intelligence) instead of just mastering one simple domain such > as an Atari game or something. > > https://en.wikipedia.org/wiki/Cortico-basal_ganglia-thalamo-cortical_loop > > https://en.wikipedia.org/wiki/Thalamus > > https://en.wikipedia.org/wiki/Basal_ganglia > > Anyway, this post is part of a series I'm doing on neural anatomy, I > already have my topic picked out for tomorrow, not sure what else I > should cover, feel free to make requests... > > -- > Clowns feed off of funny money; > Funny money comes from the FED > so NO FED -> NO CLOWNS!!! > > Powers are not rights. > -- Stefan Reich BotCompany.de // Java-based operating systems ------------------------------------------ Artificial General Intelligence List: AGI Permalink: https://agi.topicbox.com/groups/agi/T5561f5c999dffad2-M543f2ef60b0d750507f0f2c2 Delivery options: https://agi.topicbox.com/groups/agi/subscription
