Research shows that in people with ADHD, some brain regions become “hyperactive,” whereas other brain regions are “hypoactive.” This suggests that there may be a problem with the brain's computing capacity to appropriately meet the cognitive demand of the task.
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.
The ADHD brain is smaller than the non-ADHD brain and has fewer connections between different brain regions. Their brains do not have the neural organization to self-regulate and to stop automatic responses.
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.
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.
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.
Brain Structure
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.
For many individuals, ADHD impairments are made worse by their struggles with excessive anxiety, persistent depression, compulsive behaviors, difficulties with mood regulation, learning disorders, or other psychiatric disorders that may be transient, recurrent, or persistently disruptive of their ability to perform the ...
Adults diagnosed with ADHD often blame themselves for their problems or view themselves in a negative light. This can lead to self-esteem issues, anxiety, or depression.
Interpersonal Relationships
Individuals with adult ADHD may appear as one of two extremes: withdrawn and antisocial, preferring to spend their time alone; or overly social and unable to easily endure even brief periods of solitude.
Similarly, people with ADHD can also experience 'meltdowns' more commonly than others, which is where emotions build up so extremely that someone acts out, often crying, angering, laughing, yelling and moving all at once, driven by many different emotions at once – this essentially resembles a child tantrum and can ...
Similar to the hyperactive symptoms, impulsive symptoms are typically seen by the time a child is four years old and increase during the next three to four years to peak in severity when the child is seven to eight years of age.
With ADHD, a child or teen may have rapid or impulsive speech, physical restlessness, trouble focusing, irritability, and, sometimes, defiant or oppositional behavior.
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.
The problem: The social maturity of children with attention deficit hyperactivity disorder (ADHD or ADD) may be a few years behind that of their peers. In addition, they have difficulty reading verbal and physical social cues, misinterpreting remarks, or not getting jokes or games.
That's because kids with ADHD are less mature than their peers. That's what ADHD is: an immaturity of the brain's infrastructure. That immaturity impacts a child's executive functions , including attention and self-control. If a child is much younger than others in his grade, he may appear even more immature.
Is ADHD inherited from Mom or Dad? You can inherit genes that boost risk for ADHD from your mother, from your father or from both parents.
Genetics. ADHD tends to run in families and, in most cases, it's thought the genes you inherit from your parents are a significant factor in developing the condition. Research shows that parents and siblings of someone with ADHD are more likely to have ADHD themselves.
At Work or School
Research has found that people with ADHD have more creativity and idea generation than people without the disorder. 3 This can lead to outside-the-box thinking that is so important for innovation. Hyper-focus: Many people with ADHD become hyper-focused on things that interest them.
However, there is no correlation between this condition and intelligence. In fact, according to one study , ADHD affects people in the same way across high, average, and low IQ score ranges. ADHD is a neurodevelopmental condition that can make it difficult for people to focus and to control impulsive behaviors.
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.
Hyperactivity (talks a lot, fidgets, always on the go, etc.) Impulsivity (blurts out, interrupts, lies, angry outbursts, difficulty waiting, etc.) Inattention (forgetful, loses things, disorganized, makes careless mistakes, etc.)