* Dopamine is not the only chemical that influences your
habits. Every behavior involves multiple brain regions and
neurochemicals, and anyone who claims that “habits are all
about dopamine” is skipping over major portions of the
process. It is just one of the important role players in habit
formation. However, I will single out the dopamine circuit in
this chapter because it provides a window into the biological
underpinnings of desire, craving, and motivation that are
behind every habit.
