What is the neuroscience research upon which the techniques are based? Do you have any paper or book references? It could be insightful for a visitor to the site to be given more context.
There are suspicions of course, such as how deeper knowledge of a subject is able to integrate the information into more parts of the network, but afaik the actual biochemical mechanisms and how those translate into network dynamics and recall for a lot of memory and learning functions are still fairly unknown.
If anyone knows of some solid studies (preferably using humans) I would be more than happy to read them, learning and memory is a fascinating area of neuroscience.
I'm not sure that one touches on neuroscience; it's more psych-oriented if I remember correctly.