That is very interesting. Thank you. You gave me a good place to look. I took a quick peek at some articles regarding this. "This orderly recruitment of motor units is consistent with order being dictated by intrinsic electrophysiological properties of motoneurons during rhythmic behaviors driven by a central pattern generator." - First link "Collectively, the findings reported herein provide converging support for an orderly recruitment of diaphragm motor units dictated by motoneuron properties." - First link "Although both sensory feedback and neuromuscular dynamics play an important role in shaping rhythmic motor output, the basic rhythmic activity patterns are generated by central circuits called central pattern generators (CPGs). These CPGs can, when properly activated, produce rhythmic network activity in the absence of external timing cues, that is, without rhythmic sensory feedback or rhythmic activation by descending neurons." - Second link "The following is a brief review of the intrinsic properties of motoneurons that contribute to their recruitment and rate modulation. Our emphasis is on properties that may either accelerate or delay the onset of muscular fatigue. In general, intrinsic motoneuron properties are regulated in a way that minimizes energy expenditure. The correlation of recruitment threshold with motoneuron type ensures that the most fatigable motor units are reserved for the most forceful contractions. The variation in minimum firing rates arising from variations in AHP characteristics ensures that motoneurons begin to fire at rates that are matched to the force producing characteristics of their muscle units. Further, it is possible that spike-frequency adaptation contributes to optimization of the tension (force)-firing frequency (T-f) transform of individual motor units." - The abstract of the third link. https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/diaphragm-muscle https://www.sciencedirect.com/topics/neuroscience/central-pattern-generator https://link.springer.com/chapter/10.1007/978-1-4899-1016-5_10 There is definitely something here. Some time ago, I read a book by Sam Harris. He wrote that, at least theoretically, with sophisticated brain scanning (EEG or MRI type of equipment), we could follow a person an entire day and predict his behavior before he has even thought of it. It was something like 6 minutes before he has acted. Stuttering is often deemed as a self-fulfilling prophecy. We think about stutter, and given that the stutter comes next, we conclude that we stutter because we think about stutter. The obvious solution is not to think about it. That can't be it. We would have to ask why the thought of stutter occurs. We can't decide when we have which thought. As Sam Harris put it: "Thoughts only appear in consciousness, but they do not originate from it." I don't know if you've heard of Wim Hof, the guy who came up with a breathing method and cold exposure he claims can influence the autonomic nervous system. There is research that proves it. He was injected with a virus, which he ejected through conscious control of his breathing without any symptoms or pain. He didn't directly influence it or use thought, but he is definitely able to "rewire" his response to the autonomic nervous system. There are electrophysiological patterns to our behavior which are unconscious to us, and there may be a way to "effectively rearrange" them.