Early observations Sluggish cognitive tempo

johnny head-in-air absent-minded boy seems unaware of surroundings.

there have been many descriptions of inattentive , foggy children in literature. 1 example story of johnny head-in-air struwwelpeter. researchers see stories in book illustrations of many modern child psychiatric disorders. canadian pediatrician guy falardeau, besides working hyperactive children, wrote dreamy, quiet , well-behaved children encountered in practice ( les enfants lunatiques ).

symptoms similar adhd first systematically described in 1775 melchior adam weikard , in 1798 alexander crichton in medical textbooks. although weikard described single disorder of attention resembling hyperactive-impulsive subtype of adhd, crichton postulates additional attention disorder, described morbid diminution of power or energy , , further explores possible corporeal , mental causes disorder (including irregularities in diet, excessive evacuations, , abuse of corporeal desires ). however, not further describe symptoms of disorder, making non-specific reference sct-like syndrome.