Bad news for uploading
Recently, the Blue Brain Project published a paper arguing that human neurons don’t form synapses at locations determined by learning, but just wherever they bump into each other. See video and article here.
For those people hoping to upload their brains by mapping out and virtually duplicating all the synapses—this means that won’t work. The synapse locations do not differ from human to human in any useful way. Learning must be encoded in some modulation of each synapse’s function.
This isn’t surprising. It’s been pretty clear for a while that initial synaptic graphs are random / arbitrary, and then are later pruned and strengthened / weakened by learning.
As in, the number and type of neurotransmitter receptors embedded in each synapse.
This isn’t “disappointing”, this was expected. The initial wiring layout is random, though there’s some pruning that occurs in early brain development.
Preivous discussion.
I wonder if the synaptic functions could be modelled using something like this in the future.
That’s the least of the worries for mind uploaders.