Anosognosia Anosognosia is a condition in which a person who suffers a certain disability seems unaware of the existence of their disability. A condition in which a person with an illness seems unaware of the existence of his or her illness. Hemiasomatognosia is a subtype of anosognosia in which the person suffering from hemiplegia neglects one half of their body. Copyright Notice Adapted from Wikipedia. Text is available under the  Creative Commons Attribution-ShareAlike License 3.0 ; additional terms may apply.