Yes, this "diabetes insipidus" refers to a deficiency in the hormone vasopressin (AKA anti-diuretic hormone AKA ADH). But it has
nothing whatsoever to do with what people commonly refer to "diabetes".
Basically, a disturbance in the hypothalamus (HPA axis) reduces the amount of vasopressin, which results in poor retention of water in the body.
This hypothalamic dysfunction is discussed here:
https://forums.phoenixrising.me/threads/is-your-hypothalamus-up-the-creek.81181/
Excellent quote!
Simply put:
"Dysautonomia" is a general term for
any dysfunction of the autonomic nervous system.
The autonomic nervous system is
any part of the nervous system that controls unconscious activity in the body.
Therefore, the failure of the hypothalamus in the brain to release enough vasopressin is a form of dysautonomia.