what is meta-sympathetic nervous system? I always knew about the _sympathetic and para-sympathetic nervous systems_ , and today I was told about the **meta-sympathetic nervous system** , but I didn't understand well the man who told me about it and I didn't find enough or reliable information about this system, and if it's accepted in the scientific world or it's arguable.

The concept of a metasympathetic part of the autonomic nervous system (distinct from the sympathetic and parasympathetic parts) seems to be an idea discussed almost exclusively in the Russian scientific literature.(src) Many, if not a majority, of the papers concerned with it seem to have one A. D. Nozdrachev as one of the authors. He has been publishing on it at least since 1980 ("Structuro-functional organization of the vegetative (autonomic) nervous system"); most recently is from 2006 quoted in another answer ("The Metasympathetic System of the Brain"). The presentation in the latter paper seems almost incoherent to me, and apparently not due to translation. This idea doesn't seem to have much traction, particularly outside of Russia.