Gyorgy Buzsaki forklarer i boka "the Brain from Inside Out" hvordan hjernebølger over nevrale baner ("neural trajectories") dannes og gjentas ved eksterne eller interne stimuli.
fra avsnittet "Similar Neuronal Trajectories During Learning and Memory Recall", pp. 182-184:
"…For example, before the participant recalled the picture of a famous actor, the temporal area of the cortex in charge of face processing was activated together with many other voxels in other parts of the brain, displaying the same pattern as seen during the study phase. These imaging experiments support the view that neuronal assemblies that initially process episodic or semantic information are similar or overlap those that become active when we recall or imagine the same information.
…
These experiments demonstrate yet again that the neurons activated during learning are related to recall the experience and initiate the appropriate actions.…"
Jeg tar dette som en forklaring på Senecas (4-65) utsagn Docendo discimus …:
Ved å uttrykke ("eksternalisere") noe man har lært eller tenkt, aktiveres og forsterkes den nevrale banen. Læring foregår ikke bare utenfra, men like mye innenfra fordi hjernen selv starter hjernebølger, enten man sover eller er våken…‽
Fra avsnittet "Externalization: A Quick Overview":
"… The root of this mirroring between action and perception may be built upon mechanisms analogous to active sensing, with its corollary circuits (Chapter 13). However, the feedback in this extended loop is not a specialized circuit within the brain but a sequence between action-produced artifacts and their reflection back to the brain…"
Fra avsnittet "Cognitive revolution" (pp. 227-228):
"The ability to read the unique minds of other individuals through externalized objects, symbols, texts, and institutions gave rise to the cognitive revolution phase of human evolution. This sort of information reflects back to the brain to profoundly affect its circuits."
Fra avsnittet "Externalization and internalization are complementary processes" (p. 228):
"…disengagement of the brain from its environment and its ability to manipulate models of the external world are prerequisites for cognition. This operation is facilitated by externalization: internally generated thoughts are tested against action-produced artifacts, which reflect back on the original thought as a validating, grounding process. This is a protracted action-perception mirroring loop. We test the validity of a thought by acting in certain ways and, as a result, seeing things differently. Externalization is an elaborate test of internal thoughts."
Fra "Summary Chapter 6" (pp. 239-240):
"The brain areas in charge of generating plans and thoughts share many similarities with the motor cortex in terms of cellular architecture and input-output connectivity. The main difference is that the prefrontal cortex does not directly innervate motor circuits. Instead prefrontal cortical areas can be designated collectively as an internalized action system, and thus plans and thoughts can be conceived of as internalized patterns that serve as a buffer for delayed covert action. Thoughts are only useful if they lead to action, even if that action is delayed by days or years. These same brain areas and mechanisms are also responsible for externalizing thought in the form of artifacts, language, art, and literature. In turn, externalized objects, as the tangible products of abstract thought, can have a profound impact on the creator's mind and on the minds of others. Thus, externalized brain function facilitates the communication of explicit knowledge, hard-earned by a few, to all members of a community, enabling the quick and efficient spread of semantic knowledge."
Jeg tror at dette kanforklare heutagogikkens grunnprinsipp Docendo discimus…