What is the science behind this ADHD?

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What is the science behind this ADHD?

What is the science behind this ADHD?

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.

What is wrong with the brain in ADHD?

Brain development is also slower in people with ADHD. The neural pathways don't connect and mature at the same rate, making it harder to pay attention and focus. This can impair executive function, which handles organization and routine tasks. ADHD impacts brain chemistry, too.

Do people with ADHD lack dopamine?

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.

What brain chemical causes ADHD?

Recent studies show that the brain chemical, dopamine, may play a role in ADHD. Dopamine is an important chemical that carries signals between nerves in the brain. It is linked to many functions, including movement, sleep, mood, attention, and learning.

What structures of the brain are affected by ADHD?

The ADHD brain has impaired activity in four functional regions of the brain.

  • Frontal Cortex. This region controls high-level functions: ...
  • Limbic System. This region is located deeper in the brain. ...
  • Basal Ganglia. ...
  • Reticular Activating System.

Does ADHD slow brain development?

CHICAGO (Reuters) - Children and teenagers with attention deficit hyperactivity disorder have developmental delays of up to three years in some regions of the brain, U.S. researchers said on Monday.

How is the brain of someone with ADHD different?

  • Structural Differences Researchers at Radboud University Nijmegen Medical Centre conducted the largest review ever, scanning more than 3200 ADHD brains. They found that the overall size of the ADHD brain is smaller than the non-ADHD brain and the brain volume in key areas of the brain are smaller as well.

Is the hippocampus smaller in people with ADHD?

  • Another interesting finding was that the amygdala and hippocampus are smaller in the brains of people with ADHD. These areas are responsible for emotional processing and impulsivity and had previously not been definitively connected to ADHD.

What kind of neurotransmitters do people with ADHD have?

  • 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. 1. Frontal Cortex.

Who are the researchers in the new ADHD study?

  • More than 80 researchers co-authored the new study. Martine Hoogman at Radboud University Medical Center in Nijmegen, the Netherlands, led this massive research team. Her group studied 1,713 people with ADHD and 1,529 others without it. That makes it the largest ADHD study to date. Its participants ranged in age from 4 to 63.

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