What, you may ask, is ADHD?

as early as very recently I had absolutely no idea ...... all however is not lost as I have discovered that Churchill, amongst other luminaries suffered a similar malaise :)

Attention-deficit/hyperactivity disorder (ADHD) (sometimes referred to as ADD) is thought to be a neurological disorder, always present from childhood, which manifests itself with symptoms such as hyperactivity, forgetfulness, poor impulse control, and distractibility.^[2] In neurological pathology, ADHD is currently considered to be a chronic syndrome for which no medical cure is available. Both children and adults may present with ADHD, which is believed to affect between 3-5% of the population.^[3]

Much controversy surrounds the diagnosis of ADHD, such as over whether or not the diagnosis denotes a disability in its traditional sense, or simply describes a neurological property of an individual. There is also a sizable minority of clinicians who believe that the condition is not biological, but psychological in origin. Those who believe that ADHD is a traditional disability or disorder often debate over how it should be treated, if at all. According to a majority of medical research in the United States, as well as other countries, ADHD is today generally regarded to be a non-curable neurological disorder for which, however, a wide range of effective treatments are available. Methods of treatment usually involve some combination of medication, psychotherapy, and other techniques. Some patients are able to control their symptoms over time, even without the use of medication. Other individuals who meet the diagnostic criteria of ADHD do not consider themselves to be handicapped by the disorder and therefore may remain undiagnosed or, after a positive diagnosis, untreated.

ADHD is most commonly diagnosed in children and, over the past decade, has been increasingly diagnosed in adults. It is believed that around 60% of children diagnosed with ADHD retain the disorder as adults.^[4]

So .... there you have it .... phew, thank you for Wiki :)

PET scans measure brain activity. The image on the left illustrates areas of activity in the brain of a person without ADHD while doing an assigned task. The image on the right illustrates the areas of activity of the brain of someone with ADHD when given that same task.^[1]