Parent-child interactions shape the brain's emotional system, influencing the ability to transition between states of excitement and calm.

“Allan Schore is a psychiatrist and has done extensive work on how parent child interactions in particular baby and mother, but also baby and father shaped the brain and the brain and emotional system's ability to go from states of elation and excitement, the so-called dopamine epinephrine type circuitry to the more warm soothing types of calm interactions that in broad terms could be described as more serotonin oxytocin and things of that sort.”