What Is the Definition of ADHD?

ADHD is attention deficit hyperactivity disorder. A common childhood disorder, ADHD can continue in adolescence and adulthood, according to the National Institute of Mental Health (NIMH). There are three types of ADHD, classified by the presence, or lack thereof, of inattention and hyperactive-impulsivity symptoms.

Types

• The NIMH describes three ADHD subtypes: predominantly hyperactive-impulsive, predominantly inattentive and combined hyperactive-impulsive and inattentive. If you have more than six hyperactivity-impulsivity symptoms and fewer than six inattention symptoms, you are considered predominantly hyperactive-impulsive. If the inverse is true, you are classified as predominantly inattentive. Most children with ADHD have more than six symptoms in each category, giving them the combined version of ADHD.

Inattention Symptoms

• The NIMH notes that inattention symptoms among children include the inability to focus on one thing, difficulty following instructions and daydreaming.

Hyperactivity Symptoms

• Hyperactivity symptoms include non-stop talking, being constantly in motion, difficulty completing quiet tasks and inability to stay seated without excessive movement.

Impulsivity Symptoms

• Impatience, showing emotions without restraint and interrupting others are common signs of impulsivity in children, the NIMH notes.

Considerations

• The NIMH points out that symptoms of inattention, hyperactivity and impulsivity are normal for all children, but in children with ADHD the behaviors occur more frequently and with greater severity.

Treatment

• Treatment options for ADHD typically include medication and psychotherapy.