Mind

Sleep, circadian rhythm, cognition, and the nervous system.

Most of what gets called a mental problem turns out to have a mechanism underneath it.

A body clock running three hours late isn't a discipline failure. Brain fog that no amount of rest resolves usually means something is driving it. The nervous system sits between your body and your experience of it, and when it's dysregulated the effects show up as mood, focus and energy.

This section looks at those mechanisms directly.

Sleep and circadian rhythm

Delayed sleep phase disorder: can you actually fix it?

What it takes to shift a late body clock, the evidence for timed light and melatonin, the role of genetics, and whether the shift holds once you stop.

The science of trauma

How trauma changes the nervous system, why it shows up as physical illness decades later, and what shifts it. Start here.

What is a dysregulated nervous system?

What the phrase means physiologically, how it's measured, why it produces physical symptoms, and what actually moves it.

What is dorsal vagal shutdown?

The collapse state: numbness, dissociation and can't-even paralysis, the ancient branch of the vagus that runs it, and how you climb back out.

What is the window of tolerance?

The arousal zone where you can think and feel at once, the states on either side, what narrows the window, and how to widen it.

Fight, flight, freeze, fawn

The four survival responses, the physiology behind each, why you default to a pattern, and whether you can change it.

What is the fawn response?

The people-pleasing survival strategy: how to tell it from real kindness, why it forms, and how to unlearn it.

The nervous system

The vagus nerve and CIRS

Why you can feel exhausted and foggy while a standard blood panel looks completely normal.

Do vagus nerve stimulation devices work?

What each type of device has actually been shown to do, and which ones are worth your money.

Vagus nerve maneuvers

How vagal maneuvers like the Valsalva slow a racing heart, which one works best, and when not to use them.

Dysautonomia

Autonomic nervous system disorders like POTS, where the system that runs heart rate and blood pressure loses its footing.