Myelin, Mirror Neurons, the importance of Contextual Relevance, Repetition, slow & fast being the same in most ways…. all of these things (and more) are discussed in great detail in the Neuroscience & Training Program sections of my book COUNTER AMBUSH. You can learn a more about solid practice concepts i a number of videos and articles here at PDN.
These things are also covered with direct relation to defensive training in the PDN Academy Online Course here: https://www.personaldefensenetwork.com/class/counter-ambush-concepts-neuroscience/
Train (and Practice) Well! -RJP