The official classification is found in the Diagnostic and Statistical Manual of Psychiatry version four, (DSM-IV), there are three subtypes of ADHD.
1. Inattentive ADHD – mostly has difficulty focusing, easily distracted, day-dreamy, procrastinating, forgetful and disorganised.
2. Hyperactive ADHD – mostly restless, fidgety, driven, jumping from task to task, impulsive, loud, demanding, energetic and impatient .
3. Combined type ADHD – symptoms of both inattention and hyperactivity-impulsivity.
Other classifications have been described including the Amen Classification, based on clinical features, complications of ADHD and functional brain imaging features. Dr Daniel Amen describes six different types of ADHD :
Type 1 – Classic Hyperactive ADHD
short attention span, distracted, hyperactive and impulsive
Type 2 – Inattentive ADHD
Short attention span, distracted but not hyperactive or impulsive.
Type 3 – Over focused ADHD
ADHD symptoms plus tend to be stuck on negative thoughts or behaviours,
worried, rigid, upset if things don’t go their way, oppositional and argumentative
Type 4 – Temporal Lobe ADHD
ADHD symptoms plus moodiness, irritability, negativity and aggression.
Type 5 – Limbic ADHD
ADHD symptoms along with anxiety and/or depression, negativity and social isolation.
Type 6 – Ring of Fire ADHD
A combination of types 1-5 with the brain working overtime with too many thoughts