Focus can be modeled as an arrow with acetylcholine setting direction, epinephrine providing energy, and dopamine providing motivation.

“The head of the arrow, meaning the direction of your focus, is largely set by acetylcholine, which is a chemical in the brain. The shaft of the arrow is set by a chemical called adrenaline, also called epinephrine. Those are the same thing. In the brain typically it's referred to as epinephrine, and in the body, it's more commonly referred to as adrenaline, but those are the same neurochemical. Epinephrine slash adrenaline represents the shaft of the arrow and it's providing the energy for which to focus. And then we can put behind that arrow a little propeller or a motor, if you like, and the propeller or motor in the context of this neurochemistry model is dopamine, which provides ongoing motivation.”

“This particular arrow model, that is your ability to increase your focus, can be enhanced therefore by increasing acetylcholine, epinephrine, and dopamine simultaneously.”

“the two things meaning movement and cognitive movement or Pursuit are both governed by the same neurochemical systems these three catac colomines mainly dopamine with the norepinephrine and epinephrine being involved in generating Focus”