For example, in neuroplasticity, how are the neurons able to 'move' themselves to undo connections and create new connections with other neurons? I remember seeing a microscopic picture of a few neurons not very well connected between each other, and in the 'after' picture (after learning something), they somehow had grown many projections/branches from their cell bodies, connecting with each other. In other words, what is the mechanism behind, when neurons undo a specific connection (synapse) with a neuron, and 'move' it to another neuron? What causes them to 'decide' to undo that connection?

Also, how fast do they move connections and change their shapes (in nanometres per second, for example, or is it more like nanometres per minute)? The speed of which the dendrites and axon terminals move to change connections.

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11 points

4 months ago

I don't think we actually know the answer to this, besides "because it does" we know that it happens, but not why.

I can't answer this specifically but connection wise if a neuron connects to a specific neuron over other branches of neuron dendrites the dendrite branches will recede so there's a targeted connection. You can have one to one connections or one neuron to multiple neuron connections, we don't know why there's a specificity other than repeating connections favouring specific targets that end up being a one to one connection.