What would we do without dopamine? The answer is: nothing. We can’t do anything without dopamine, which is the literal source of all motivation—all movement—whether physical or psychological. Why then are so many people going on and on about how we all need a dopamine detox? Why are we advised to be wary of substances or activities that provide us with “hits” of dopamine, as if dopamine were a drug?
Considering popular, and even some scientific, perspectives on dopamine tends to put me in mind of the lyrics of a song by the Animals straight out of the wayback machine:
I’m just a soul whose intentions are good.
Oh Lord, please don’t let me be misunderstood.
While dopamine’s functions* are wide and varied, its role in regard to the brain’s reward system has been clarified. Dopamine is not the source of pleasure in the brain. That role is played by the liking neurochemicals, such as serotonin, oxytocin, endorphins, endocannabinoids, and endogenous opioids. Dopamine is called the “wanting” neurochemical because it is the source of…wanting, which is really just another word for motivation.
Dopamine is released when the brain expects to experience a reward, meaning it expects to experience something it likes. It causes us to take action by moving toward the reward.
Let’s say you notice you’re thirsty and you consider getting up from your desk to get a glass or bottle of water. Do you want the water enough to stop what you’re doing and take an action to get it? In other words, how motivated are you? How enticing is the water? How rewarding do you think it will be? How much pleasure do you think you’ll get from it? (Of course, it’s your brain that makes the choice, but you get to experience both the wanting and the liking.)
Although dopamine is not one of the liking neurochemicals, the brain “likes” to want. It likes to be motivated, to get us to move. So liking neurochemicals are released along with dopamine, to a greater or lesser extent depending on how rewarding the brain expects the experience or substance to be. The so-called wanting system in the brain is considered to be robust, while the liking system is fragile. That’s because the liking neurochemicals don’t stick around for long, so the brain moves on to wanting something else. Liking comes and goes but wanting persists.
Those who believe we should not want simply don’t understand how the brain works. Wanting is essential for being awake and for living an awake life, as was illustrated in the 1990 movie Awakenings. Robin Williams played neurologist Oliver Sacks, who in the early stage of his career dosed catatonic patients with levodopa, the precursor to dopamine in an attempt to literally wake them from their unresponsive states.
Going on a dopamine detox (conceptually, anyway, since the idea is nonsensical), would be like deciding to stop eating altogether in order to avoid sugar. It would be like advising someone not to pursue something they’re passionate about because that would generate “too much” dopamine.
Although dopamine plays a role in compulsive or addictive behavior, it is neither a drug, nor does it function like a drug. Instead of trying to manage dopamine—which is not a game for amateurs—we ought to focus on identifying better targets. We could learn how to use the wanting system to pursue the things we think would provide us with a more satisfying and meaningful life.
Next time I’ll talk about two important dopamine pathways in the brain and how they affect our ability to create change.
*Dopamine plays a role in your brain’s reward system, which includes feeling pleasure, achieving heightened arousal, and learning. Dopamine also helps with focus, concentration, attention, memory, sleep, mood, and motivation. And it is involved with decision-making, movement, working memory, and learning. It is one of the most extensively studied neurochemicals, mainly because it plays such diverse roles in human behavior and cognition. Dopamine is also a factor in Parkinson’s disease, addiction, schizophrenia, and other neuropsychiatric disorders.
This post is part of a series on neurotransmitters that both affect our behavior and are affected by our behavior.
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