Attention deficit hyperactivity disorder (ADHD) is a group of behavioural symptoms that include inattentiveness, hyperactivity and impulsiveness. Attention deficit disorder (ADD) is a sub-type of ADHD.
ADHD is a neuro-behavioural disorder that begins in early childhood and can continue into adulthood.
Common symptoms of ADHD include:
A short attention span, restlessness or constant fidgeting, being easily distracted, very disorganised
often loosing things, struggling to learn good social skills, being constantly ‘on the go’, poor academic achievment (in some cases)
Symptoms of ADHD tend to be first noticed at an early age, and may become more noticeable when a child's circumstances change, such as starting school.
Young children are naturally active and easily distracted. However, if these features are excessive for a child's age and general developmental level, and affecting their daily life, they may indicate ADHD.
ADHD is diagnosed when symptoms have been present for more than six months Difficulties are expressed at an intense level at home and in school There is a severe adverse effect on social and cognitive functioning. The difficulties usually would begin before age 7 and other possible causes have been ruled out.
What are the causes of ADHD?
Although the exact cause of ADHD is not known, research shows that it tends to run in families. Some research also shows that there may be differences in the way the brain works in people with ADHD. ADHD is often a genetically inherited disorder• twin studies :• family studies :
• adoption studies• molecular genetics. Overall heritability is 0.77 – only height has greater heritability.