What is ADHD?

Definitions
*Note: please keep in mind that symptoms may greatly vary on an individual basis and one should not stereotype individuals with ADHD as having all of the following characteristics.

ADHD: (Attention Deficit Hyperactivity Disorder) - “ADHD describes children who display persistent age-inappropriate symptoms of inattention, hyperactivity and impulsivity that are sufficient to cause impairment in major life activities” (Mash & Wolfe, 2005, p.110)

Inattentive: not focusing on tasks and behaving carelessly (forgetful, distracted, lose things, avoid long mental tasks, disorganized, not following instructions, careless mistakes), unable to persist doing a task even if they want to

Hyperactive: constantly moving, fidget, don’t sit for long, excessive talking

Impulsive: act without thinking, lack self-control, blurt out answers, don’t wait their turn, interrupt conversations

Etiology / Cause
  • neurologically based problems of response inhibition causes problems in 4 areas of cognitive function including working memory, internalized speech, motivational appraisal and relating past experience to current situations 
  • noticeable before age of 7 
  • biological & environmental risk factors: genetic link, prenatal alcohol or tobacco exposure, pregnancy complications, environmental toxins such as lead

Incidence
 http://www.cdc.gov/ncbddd/adhd/data.html   

  • Rates of ADHD diagnosis increased an average of 3% per year from 1997 to 2006 and an average of 5.5% per year from 2003 to 2007.   
  • Rates of ADHD diagnosis increased at a greater rate among older teens as compared to younger children.
Prevalence
 http://www.statcan.gc.ca/pub/82-003-x/2010002/article/11234/key-cle-eng.htm 

Approximately 2.1% of Canadian children aged 6 to 11 had ADHD in 2010 (based on a scale including can’t sit still, distractible, fidgets, impulsive, difficulty sitting still, cannot settle for long, can’t concentrate, inattentive).