The model proposes, when viewed from the inside, any non thinking and non intelligent organism with such a configuration is simply maintaining equilibrium and that this equilibrium extends in another direction - that of evolution. Connect signalling pathways with such molecular mechanisms and the proposed action of the AONE on the genome is entirely possible. In the cerebellum the desire to ride a bicycle obviously has no relevance and instead it is the overall ability of the non-intelligent organism to balance that becomes significant. If succeeding generations of human beings not only learned to ride bicycles but began doing so for greatly increased periods then any transient disruptions the activity produced in the AONE would be integrated during this time. From an external viewpoint this would be perceived as a relative improvement in the ability of human beings to balance that would be independent of any specific activity.
Homeostasis is the maintaining of equilibrium varying about a mean.
Although there are obvious difficulties in talking about single structures within a naturally integrated organism there existed earlier in Man's evolutionary history an ancestor whose tail provided a naturally utilized input into the AONE of that time. The reason this occurred is because equilibrium of the AONE would have been upset in a negative direction. This in turn set a new and lower threshold which, when it too was no longer reached, then caused the process to be repeated etc. The transitory appearance of gills in the human fetus or even the appendix could serve equally well as examples. Other examples of phenotypic plasticity include the abilities to tan and form calluses.