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To Comment # 92
Yes people can. This has been known since at least the mid 70s. Do a search on google scholar for some of the papers on it. Typical name for it is usually something like “biofeedback control of heart rate.” Once again our conscious control exists but is limited. The primary control comes through our autonomic nervous system (particularly in the brain stem).
[Once again, doesn’t prove anything to the present topic – just a response to an untrue statement that was made, and a fact that I find rather interesting]