As you know, one trademark of ADHD is low levels of the neurotransmitter dopamine — a chemical released by nerve cells into the brain. Due to this lack of dopamine, people with ADHD are "chemically wired" to seek more, says John Ratey, M.D., professor of psychiatry at Harvard Medical School in Boston.
Indeed, ADHD brains struggle to sustain motivation when rewards are mild or are linked to long-term gratification. As a result, ADHD brains search for stimulation that can increase dopamine more quickly and intensely. Ultimately, the pursuit of pleasurable rewards may become a potent form of self-medication.
That said, dopamine and ADHD have a complicated relationship. It's a constant struggle to keep your brain balanced with just enough—but not too much—of that good feeling. Since ADHDers have less dopamine1, they may find themselves seeking out anything and everything that might make them feel good.
People with ADHD have at least one defective gene, the DRD2 gene that makes it difficult for neurons to respond to dopamine, the neurotransmitter that is involved in feelings of pleasure and the regulation of attention.
A study in 2008 found that people with ADHD can sometimes have genes that lead to a lack of dopamine. People who have a dopamine receptor gene variation called 7R are believed to be more likely to engage in behaviors that could have harmful consequences — like financial risk taking or heavy alcohol use.
If your child has ADHD, they may be low in dopamine but high in something called dopamine transporters. That's because their low dopamine may actually result from having too many of the transporters that take dopamine out of their brain cells.
Executive functions have other roles which affect how someone thinks. In people with ADHD, these executive dysfunctions impact thinking in numerous ways. People with ADHD don't really think faster than people without it, but it can sometimes seem like they do. People with ADHD do think differently though, in a sense.
Yet, we know one of the hallmark challenges for ADHD adults is self-regulation, which involves multiple executive functions, including, yes, internalized self-talk.
The ADHD brain has been described as an “interest-based nervous system”: It seeks high-stimulation situations, stronger incentives, and more immediate rewards, which trigger a quick and intense release of dopamine and with it a rush of motivation. Hyperfocus. Dopamine is the brain's most intense reward.
Stimulant medications that treat ADHD can prevent the reuptake of dopamine, increasing brain levels of the chemical. Lifestyle changes can also help, especially in conjunction with standard ADHD treatments. Exercise, a healthy diet, and therapy all offer potential benefits.
Our brains spend a lot of time looking for dopamine. That really means we look for the situations, activities or substances that lead to the brain giving us a hit of dopamine. When we do get that hit, we feel good; dopamine helps us feel alive, happy, engaged and motivated.
Some signs that you might be understimulated include: Lack of motivation. Physical hyperactivity. A sense of unease, making you feel "flat" or irritable.
The mind of a person with ADHD is full of the minutiae of life (“Where are my keys?” “Where did I park the car?”), so there is little room left for new thoughts and memories. Something has to be discarded or forgotten to make room for new information. Often the information individuals with ADHD need is in their memory…
And there's a biological reason individuals with ADHD favor risky behaviors: “ADHD brains crave stimulation,” writes Ellen Littman, Ph. D.
Masking is when a person with ADHD acts in a “socially acceptable” way to fit in and form better connections with those around them. This usually involves camouflaging their symptoms by controlling their impulses, rehearsing responses, and copying the behaviors of those who don't have ADHD.
ADHD brains have low levels of a neurotransmitter called norepinephrine. Norepinephrine is linked arm-in-arm with dopamine. Dopamine is the thing that helps control the brain's reward and pleasure center. The ADHD brain has impaired activity in four functional regions of the brain.
Consider these advantages afforded to those with ADD or ADHD: They excel in unstructured situations and conversations. They tend to be more intuitive. They tend to be much more creative.
In research, it's often referred to as “poor attentional control” or the impaired ability to filter irrelevant information and inputs. That impaired filter may be the same underlying issue that makes people with ADHD vulnerable to overstimulation: your brain is paying attention to everything all at once.
In one study, researchers found that people with self-reported ADHD symptoms earned lower scores for affective empathy compared to other participants. However, they were still within the range of what's considered typical for empathy levels overall.
Obsessing and ruminating are often part of living with attention deficit hyperactivity disorder (ADHD). No matter how hard you try to ignore them, those negative thoughts just keep coming back, replaying themselves in an infinite loop.
People with ADHD tend to talk — a lot. We talk because we're excited or nervous, or because we just want to be a part of the conversation. Sometimes we talk simply to fill the silence because silence is hard for us.
Falling in love can be an emotional roller coaster for most teens. But for teenagers with ADHD, symptoms like impulsivity or trouble managing emotions can make falling in love or starting a relationship an even bumpier ride. That said, not all kids with ADHD struggle in the same way, or to the same degree.
Brain MRI is a new and experimental tool in the world of ADHD research. Though brain scans cannot yet reliably diagnose ADHD, some scientists are using them to identify environmental and prenatal factors that affect symptoms, and to better understand how stimulant medications trigger symptom control vs. side effects.
Those with combined hyperactive-impulsive and inattentive ADHD experience both poor sleep quality and a later bedtime. Many ADHD symptoms are similar to symptoms of sleep deprivation. Among others, adult ADHD sleep problems can lead to forgetfulness and difficulty concentrating during the day.