Andrew Huberman· PhD
the errors themselves are signaling to the brain and nervous system, "Something's not working." ... the brain understands the neurochemicals that are released, namely epinephrine and acetylcholine, but also, and we'll get into this, the molecule dopamine when we start to approximate the correct behavior just a little bit, and we start getting a little bit right. So what happens is when we make errors, the nervous system starts releasing neurotransmitters and neuromodulators that say, "We better change something in the circuitry."