I had a therapist try to shove this one down my throat, after first learning the conventional Window of tolerance model.

PV didn't make sense to me. I spent a lot of time in the lower half of WoT, upper parts of hypo-arousal. and the inverted order of PV theory made no sense at all. I was routinely drifting between low arousal "normal" life and hypo arousal depression, with no excursions into hyper arousal.

Indeed reading about hyperarousal, I don't think I have *ever* been in that state -- certainly not as far as gettingo the point where the pre-frontal cortex shuts down.

So I did some reading:

https://en.wikipedia.org/wiki/Polyvagal_theory

The article starts

Polyvagal theory (poly- "many" vagal "wandering") is a collection of unproven, evolutionary, neuroscientific, and psychological constructs pertaining to the role of the vagus nerve in emotion regulation, social connection and fear response, introduced in 1994 by Stephen Porges.

It is popular among some clinical practitioners and patients,[1] but is not endorsed by current social neuroscience.[2][3][4][5][6][7]

I challenged my 2nd therapist for espousing this theory. She fired me.

I told my 3rd T. about the lack of science when she mentioned. She asked for references. I sent them. She's now quiet on this topic.