Your Brain Is Learning What to Do Again
Think about something you do without much thought. Maybe you check your phone when it buzzes, grab a snack after school, or put your backpack in exactly the same place every day. At first, behaviours require more thought, but repeat them enough and your brain gets better at starting them automatically. That is basically what a habit is: something you have done enough times that it becomes easier to do again. This is normally useful because you do not want to carefully think through every step of brushing your teeth each morning. Having to call a strategic planning meeting with your toothbrush would be an impressively bad use of breakfast. Your brain saves effort by learning patterns and making familiar actions easier.
Your Brain Changes When It Learns
Your brain contains billions of cells called neurons that communicate with one another. When you learn, connections among groups of these cells change. This ability to change through experience is called neuroplasticity, and it helps you learn everything from a new movement to a new idea. Your experiences help shape what your brain becomes better at noticing, remembering and doing. The interesting part is that your brain does not only learn the patterns you deliberately decide to practise.
One chemical involved in this learning is dopamine. You may have heard dopamine called the brain's “pleasure chemical,” but that explanation misses much of the story. Dopamine helps your brain learn what is important, what is rewarding and what might be worth doing again. It also helps your brain learn cues, which are things that predict what might happen next. Once that connection becomes strong, the cue itself starts getting your attention. That is where some very familiar behaviour begins.
Suppose your phone buzzes. Before you know who messaged you or whether you even care, your attention has probably moved toward your phone. Your brain has learned from previous experiences that the buzz sometimes leads to something interesting. The same thing happens when a smell makes you think about food or walking into a particular place reminds you what you normally do there. Your brain is constantly connecting what happened before with what happened next. Usually, this is extremely useful.
What Happens When Drugs Enter the Picture?
Addictive substances also affect these learning and reward systems. Different drugs affect the brain differently, so alcohol, nicotine, cannabis, opioids and stimulants should not all be treated as though they work exactly the same way. With repeated use, however, the brain learns connections between a substance and the people, places, feelings and situations surrounding its use. A certain place, group of people or feeling may eventually trigger a strong urge before the person has used anything. The brain has learned what that cue predicts. This is not someone calmly deciding to create an urge; it is a response strengthened through repeated experience.
Something else sounds strange at first: wanting something and enjoying it are not exactly the same thing. A person may strongly want to use a substance even when they no longer enjoy it nearly as much as they once did. The brain systems that push us toward something are not exactly the same as those involved in enjoying it. This helps explain why someone may say they do not even enjoy using anymore and still experience a powerful urge. Repeated wanting does not necessarily mean repeated pleasure.
So Is Everything Rewarding Addictive?
Definitely not. Food, music, friendship, physical activity, accomplishment and laughing so hard that no sound comes out all involve normal reward systems. Dopamine is part of normal brain function, not a warning siren for addiction. The important questions begin when control starts changing. Is the person able to stop or change the behaviour when they want to? Is it becoming harder to control, or is it repeatedly pushing aside sleep, relationships, responsibilities or safer decisions?
That connects directly with what you have already learned about Safety. Staying safe sometimes means recognizing that circumstances have changed and then stopping, leaving, refusing, contacting someone or choosing another option. Your brain, meanwhile, is learning from what you repeatedly do and from the cues connected with those experiences. Usually that ability is incredibly helpful. With addictive substances, those same learning systems become part of a much more serious problem as the pull to repeat the behaviour grows stronger. The next question is what happens when knowing you should stop and actually being able to stop become two very different things.
