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.
Brain function and structure
Other studies have suggested that people with ADHD may have an imbalance in the level of neurotransmitters in the brain, or that these chemicals may not work properly.
ADHD was the first disorder found to be the result of a deficiency of a specific neurotransmitter — in this case, norepinephrine — and the first disorder found to respond to medications to correct this underlying deficiency. Like all neurotransmitters, norepinephrine is synthesized within the brain.
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.
There are three causes of ADHD symptoms: genetics, biology, and chemistry. Learning about these causes can help you understand that your daughter is not doing these behaviors intentionally.
Causes of ADHD
Recent studies link genetic factors with ADHD. In addition to genetics, scientists are studying other possible causes and risk factors including: Brain injury. Exposure to environmental risks (e.g., lead) during pregnancy or at a young age.
Thayer's study shows that the ADHD group of children had larger and more frequent variations. Fathers with ADHD will pass this code discrepancy to offspring. Barkley explains that the heritability of ADHD runs around 80 percent. Genetics account for 80 percent of the components that define ADHD.
As you know, one trademark of ADHD is low levels of the neurotransmitter dopamine — a chemical released by nerve cells into the brain.
High-risk activities — driving fast, motorcycle riding, and waterskiing — motivate ADHD brains to focus. Some extreme activities, like daring ski jumps, sky-diving, or taking fast-acting street drugs, elicit a dopamine spike, the brain's most intense reward.
B Vitamins for ADHD
“Vitamin B-6 seems to increase the brain's levels of dopamine, which improves alertness,” says Brown. To purchase: Drugstore chains offer inexpensive high-quality, store-brand B-vitamin formulations.
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.
Traumatic Brain Injury in Children Can Lead to ADHD Years Later. Researchers say it can take up to a decade for attention deficit hyperactivity disorder symptoms to show up in children after they have a serious head injury.
Barkley, PhD. “Children diagnosed with ADHD are not likely to grow out of it. And while some children may recover fully from their disorder by age 21 or 27, the full disorder or at least significant symptoms and impairment persist in 50-86 percent of cases diagnosed in childhood.
The exposure to stressful life events, and—more specifically—Childhood Trauma, has been shown to predict ADHD onset as well as persistence of the disorder into adulthood (Biederman et al. 1995; Friedrichs et al.
Attention-deficit/hyperactivity disorder (ADHD) is one of the most common mental disorders affecting children.
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.
Getting enough sleep, exercising, listening to music, meditating, and spending time in the sun can all boost dopamine levels. Overall, a balanced diet and lifestyle can go a long way in increasing your body's natural production of dopamine and helping your brain function at its best.
People with ADHD have higher chances of being nutrient deficient than the average person. People with ADHD are twice as likely to suffer iron-deficiency anemia compared to members of the general population. 78.4% of children with ADHD are deficient in vitamin D compared to 48% of children without ADHD.
Stimulants are believed to work by increasing dopamine levels in the brain. Dopamine is a neurotransmitter associated with motivation, pleasure, attention, and movement. For many people with ADHD, stimulant medications boost concentration and focus while reducing hyperactive and impulsive behaviors.
Available evidence suggests that ADHD is genetic—passed down from parent to child. ADHD seems to run in at least some families.
While the exact causes of ADHD have not been identified, genetic studies show there is a strong hereditary component, with an up to a 91 percent likelihood of passing the disorder to your children.