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.
ADHD is associated with abnormally low levels of the neurotransmitters transmitting between the prefrontal cortical area and the basal ganglia i.e., dopamine and noradrenaline. Dopamine is closely associated with reward centers in the brain, and also interacts with other potent neurotransmitters to regulate mood.
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.
Smaller hippocampus and amygdala sizes can cause impairment in the regulation of memory, emotion, and behavior, which is a common symptom of kids with ADHD. While these regions of the brain may remain smaller in people with ADHD, studies have shown that they do continue to grow and mature as children get older.
At the brain circuitry level, the superior longitudinal fasciculus (SLF) and cortico-limbic areas are dysfunctional in individuals with ADHD.
Indeed, neuroscientists found that adults who were diagnosed with ADHD as children had a lower total brain volume than adults who were not diagnosed with ADHD. The cortical thickness of the outer layer of their brain was lower and they had more cortical thinning in the parts of the brain affected by ADHD.
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.
The largest review ever of ADHD patient brain scans was carried out at Radboud University Nijmegen Medical Centre and published in 2018. Parts of the ADHD brain mature at a slower pace (approximately one to three years) and never reach the maturity of a person who does not have ADHD.
These may include hyperfocus, resilience, creativity, conversational skills, spontaneity, and abundant energy. Many people view these benefits as “superpowers” because those with ADHD can hone them to their advantage.
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.
A chronic deficit of serotonin (5-HT) at the synapse may trigger symptoms of ADHD.
ADHD Statistics: Demographics, Race & Ethnicity
Black children aged 3 to 17 years are more likely to have ever been diagnosed with ADHD or a learning disability (16.9 percent) compared to white (14.7 percent) and Hispanic children (11.9 percent).
Why? Sugar and other high carb foods boost dopamine levels in the brain, leading us to crave them more often when dopamine levels are low. Since children with ADHD have chronically low levels of dopamine, they are more likely than other children to crave and eat sugary or carbohydrate-heavy foods.
Because of differences in the brain structure of people with ADHD, they often find it incredibly difficult to feel motivated to stay focused when the task is uninteresting or unrewarding. A person without ADHD may be just as bored, but they can marshall their motivation and focus for long enough to slog through it.
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…
You can inherit genes that boost risk for ADHD from your mother, from your father or from both parents. In a recent Norwegian study, inherited risk was somewhat higher when a child's mother had ADHD compared to their father, but researchers weren't certain why that would be. What are the main causes of ADHD?
ADHD is not on the autism spectrum, but they have some of the same symptoms. And having one of these conditions increases the chances of having the other. Experts have changed the way they think about how autism and ADHD are related.
A: ADHD brains need more sleep, but find it doubly difficult to achieve restfulness. It is one of those ADHD double whammies: ADHD makes it harder to get enough sleep, and being sleep deprived makes it harder to manage your ADHD (or anything else).
At what age are symptoms of ADHD the worst? The symptoms of hyperactivity are typically most severe at age 7 to 8, gradually declining thereafter. Peak severity of impulsive behaviour is usually at age 7 or 8. There is no specific age of peak severity for inattentive behaviour.
The brain's frontal lobes, which are involved in ADHD, continue to mature until we reach age 35. In practical terms, this means that people with ADHD can expect some lessening of their symptoms over time. Many will not match the emotional maturity of a 21-year-old until their late 30's.
Shankman: Simply put, ADHD is the brain's inability to produce as much dopamine, serotonin, and adrenaline as “regular” people's brains produce. Because of that, our brains have become “faster.” When managed right, that becomes a superpower. Have you found that you tend to think faster than most people? Yes.
A popular misconception is that all children with attention deficit hyperactivity disorder (ADHD) are naturally smarter and have a higher IQ than children without ADHD. However, there is no correlation between this condition and intelligence.
“Self-medicating” with argument is a prime example. Many people with ADHD are, if anything, argument-averse. And certainly, you needn't have ADHD to be an argumentative son of a gun. Yet, some individuals with ADHD do habitually bait others into heated disagreements.
The Gift of ADHD: They say that adults with attention deficit hyperactivity disorder (ADHD) have almost a sixth sense about people. My sharp sense of intuition is the one personal attribute that I've always been proud of. Since I was little I've been able to smell a two-faced person from a mile away.