Cognitive impairment

Nature

Cognitive deficit is an inclusive term to describe any characteristic that acts as a barrier to the cognition process.

The term may describe

deficits in overall intelligence (as with intellectual disabilities), specific and restricted deficits in cognitive abilities (such as in learning disorders like dyslexia), neuropsychological deficits (such as in attention, working memory or executive function), or it may describe drug-induced impairment in cognition and memory (such as that seen with alcohol, glucocorticoids, and the benzodiazepines.)

Source: Wikipedia

Incidence 
Deficiencies of folate, niacin, riboflavin and thiamine can produce cognitive impairment.
Value(s) 
Type 
(E) Emanations of other problems