Acetylcholine is associated with states of focus, which can be either high-energy or calm and relaxed.

“So next is the neuromodulator acetylcholine. And as I mentioned earlier, acetylcholine is associated with states of focus and those states of focus can be high energy states of focus. So the ones that are accompanied by high levels of dopamine and epinephrine and where we're really excited about and really lasered in on something, or they can be the calmer, more relaxed states of focus like reading a book or practicing music or listening very carefully to somebody in a way that's relaxed and calm.”