Essentials: How to Focus to Change Your Brain

990.112 - 1015.416 Andrew Huberman

One is also in the brainstem, and it's named different things in different animals, but in humans, the most rich site of acetylcholine neurons or neurons that make acetylcholine is the parabigeminal nucleus, or the parabrachial region. All you need to know is that you have an area in your brain stem, and that area sends wires, these axons, up into the area of the brain that filters sensory input.