Although overall volumes of the amygdala did not differ between subjects with ADHD and controls, surface analyses showed that several amygdalar subregions were smaller in children with ADHD than in controls, and these same regions generally correlated significantly and positively with the severity of ADHD symptoms.
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.
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].
They found that brain size was different between the two groups. Children with ADHD had smaller brains by about 3 percent , although it is important to point out that intelligence is not affected by brain size. The researchers also reported that brain development was the same in children with or without ADHD.
Patients with ADHD have symptoms similar to those caused by lesions to the right PFC. Imaging studies have shown reduced size and reduced functional activity of the right PFC in patients with ADHD.
Results: Amygdala volumes in patients with ADHD were bilaterally smaller than in patients with MD and healthy controls. In ADHD, more hyperactivity and less inattention were associated with smaller right amygdala volumes, and more symptoms of depression with larger amygdala volumes.
Neuroimaging studies have revealed the structural differences in the ADHD brain. Several studies have pointed to a smaller prefrontal cortex and basal ganglia, and decreased volume of the posterior inferior vermis of the cerebellum — all of which play important roles in focus and attention.
Brain magnetic resonance imaging (MRI) can be used to identify people with attention-deficit/hyperactivity disorder (ADHD) from patients without the condition, according to a new study published in Radiology. Information from brain MRIs may also help to distinguish among subtypes of ADHD.
On average, the brains of ADHD children matured about three years later than those of their peers. Half of their cortex has reached their maximum thickness at age 10 and a half, while those of children without ADHD did so at age 7 and a half; you can see an evocative Quicktime video of this happening online.
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.
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.
ADHD develops when the brain and central nervous system suffer impairments related to the growth and development of the brain's executive functions — such as attention, working memory, planning, organizing, forethought, and impulse control.
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.
Background: Attention-deficit/hyperactivity disorder (ADHD) is associated with structural abnormalities in total gray matter, basal ganglia, and cerebellum. Findings of structural abnormalities in frontal and temporal lobes, amygdala, and insula are less consistent.
What is the cause or basis of ADHD? It is an impulse disorder with genetic components that results from imbalances of neurotransmitters.
“In evaluating the health consequences of ADHD over time, we found that ADHD adversely affects every aspect of quality of life and longevity. This is due to the inherent deficiencies in self-regulation associated with ADHD that lead to poor self-care and impulsive, high-risk behavior.
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).
ADHD is often also associated with lower intelligence quotient (IQ; e.g., Crosbie and Schachar, 2001). For instance, Frazier et al. (2004) reported in their meta-analysis that in comparison to individuals without ADHD, individuals with ADHD score an average of 9 points lower on most commercial IQ tests.
Type 6: Ring of Fire ADD
Symptoms: primary ADD symptoms plus extreme moodiness, anger outbursts, oppositional, inflexibility, fast thoughts, excessive talking, and very sensitive to sounds and lights. I named it Ring of Fire after the intense ring of overactivity that I saw in the brains of affected people.
Attention Deficit Hyperactivity Disorder (ADHD) is a neurological disorder that affects a person's ability to control their behavior and pay attention to tasks.
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.
Adults with ADHD may find it difficult to focus and prioritize, leading to missed deadlines and forgotten meetings or social plans. The inability to control impulses can range from impatience waiting in line or driving in traffic to mood swings and outbursts of anger. Adult ADHD symptoms may include: Impulsiveness.
In typical people, the amygdala continues to grow for longer into adulthood than other brain regions do. In people with autism, by contrast, it grows faster than normal in early childhood, up until around age 12, and then tapers off, and it may even shrink.
Psychiatry Clin Neurosci.