International Compendium of Cognitive Deficits and Behavioral Neurology Standards

• Alexia — A severe neurological disorder characterized by the total or partial loss of the ability to read and comprehend written language, caused by an acquired lesion in the brain structures involved in visual-linguistic processing (specifically in the left parietal or occipital lobe). Unlike illiteracy, the condition occurs in individuals who previously possessed the ability to read, and unlike dyslexia, it is an acquired condition rather than a developmental disorder.