The autonomic nervous system and the glymphatic nervous system are both things I never really learned about in schools. ANS is taught as a textbook fact of homeostasis, not the constant fight-or-flight reflex that’s on every second of every day and the impacts that causes on health. The glymphatic system has only been discovered in the last 10 years but helps explain why sleep deficits explain cognitive performance decrements, mental health concerns, and age-related declines. And still so much we don’t know like gut-brain health and neuroelectronics as for implants!