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.
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.
Research has shown that in children with ADHD, the prefrontal cortex matures more slowly than typically developing kids. It is also slightly smaller in size. Similarly, the cerebellum, hippocampus, and amygdala are also thought to be smaller in volume in kids with ADHD.
These findings suggest that the prefrontal cortex and its connections may be associated with ADHD symptoms such as distractibility, forgetfulness, impulsivity, poor planning and hyperactivity in both children and adults with ADHD [27].
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.
As a result, ADHD brains send out distress messages demanding more glucose, and the owners of those brains suddenly crave sugary foods and carbohydrates, which can be quickly converted into glucose. Glucose increases dopamine and serotonin, so brains experience pleasure and greater calm.
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.
No matter what age, gender, or race you are, ADHD feels different for everyone. For a person with ADHD, it can be a constant struggle to organize everything: from the thoughts inside my head or the never-ending list of tasks to do to sorting my stuff, often leading to trouble locating misplaced things.
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.
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…
I explain that ADHD is a neurological condition which includes symptoms of inattentiveness and hyperactivity. I then go onto listing the key traits that I struggle with such as: difficulties focusing, impulsiveness, procrastination and always feeling like I'm being 'driven by a motor'.
A chronic deficit of serotonin (5-HT) at the synapse may trigger symptoms of ADHD.
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.
Usually, the most difficult times for persons with ADHD are their years from middle school through the first few years after high school. Those are the years when students are faced with the widest range of tasks to do and the least opportunity to escape from the tasks that they struggle with or find to be boring.
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.
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.
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.
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.
“Frustration, pain, and low self-esteem are all a direct result of ADHD. Never meeting neurotypical expectations beats up the emotions of some with ADHD. Overreactions and meltdowns are all part of ADHD, but they are compounded by the emotional anguish that comes from taunts and criticism.