|Here is some information about what is currently known about ADHD. This is from a book called the ADHD BOOK OF LISTS ( page, 11) by Sandra Rief.
1. ADHD has been the focus of a tremendous amount of research. There are literally thousand of studies and scientific articles published ( nationally and internationally) on ADHD.
2 . The evidence from an overwhelming amount of worldwide research indicates that ADHD is a neuro-biological disorder. ( it is believed to be a problem of brain chemistry).
3. Degrees of ADHD range from mild to severe.
4. There are different types of ADHD with a variety of characteristics. No one has all of the symptoms or displays the disorder in the exact same way. That is why it is important to get a thorough evaluation to understand each individual's combination of severity and other conditions that might go along with the ADHD itself, such as a learning disorder, anxiety, depression, oppositional defiant disorder, etc.
5. Over 50% of individuals with ADHD have an additional coexisting disorder. The percentage is higher as age increases if the ADHD is not identified and treated, as it eventually will cause other problems in a person's life.
6. ADHD is a performance disorder, a problem of being able to produce or act upon what one knows.
7. It is a physiological disorder that causes difficulty with self-regulation and goal-directed behavior.
8. ADHD is a developmental delay or lag in inhibition, self-control, and self-management.
9. ADHD is a pattern or constellation of behaviors that are so pervasive and persistent that they interfere with daily life.
10. ADHD is a medical condition caused predominantly by genetic factors that result in certain neurological differences. It is about 80-90% inherited and 20-10% acquired. Trauma to the developing fetus during pregnancy or birth , which may cause brain injury or abnormal brain development, can cause ADHD.