Learning Path · Body
How the brain runs
Seven steps through the signal, its raw materials, the membrane, overnight cleanup, the fertilizer from muscle, the gut cable, and which layer aging actually changes.
For: Someone who wants how the brain actually runs in the body, not a brain-food shopping list
Start with the hardware. A clean signal needs an ion gradient, myelinated insulation, and a customs gate that decides what may enter the brain.
- Nervous SystemOpen in the atlas
Once customs lets things in, the attention transmitter still needs raw material. Choline is what acetylcholine is made from — egg yolk on the plate sits closer to that job than a 'smart' powder on a shelf.
- CholineOpen in the atlas
Transmitters have to land on a membrane. A large share of that synaptic sheet is fat, especially long-chain omega-3. Running short is not missing a supplement — it is swapping the material the membrane is made of.
- Fats & Omega-3Open in the atlas
The pathways used by day are cleared and the memories moved at night. Sleep is not an off switch — it is the brain's physical maintenance shift.
- Sleep Architecture & Sleep DebtOpen in the atlas
Besides maintenance there is fertilizer. Contracting muscle releases signals into blood; some of them knock on the brain and raise BDNF. That is the material basis for exercise changing mood and cognition — not a pep talk.
- Exercise as medicineOpen in the atlas
The brain does not only listen inside the skull. The vagus cable is mostly the gut reporting upward, and microbial metabolites are a second, chemical road.
- The Gut-Brain AxisOpen in the atlas
Last, which layer aging actually changes. What slows is often the insulation on white-matter cables, not the machine burning out. Slower is not broken, and dementia is not the inevitable end of getting older.
- Cognitive Aging & Cognitive ReserveOpen in the atlas