Anosognosia is defined as:

• A. A condition in which a person with an illness seems unaware of the existence of his or her illness
• B. A mood disturbance in which mood cycles between extremes
• C. A deficit in recognizing faces
• D. An impairment in the ability to speak fluently

Answer: (A)

Anosognosia is a deficit in awareness of one's own illness or neurological deficits. In practice, a person may genuinely fail to recognize paralysis or other impairments after brain injury, even when others can clearly see the problem. This insight loss is most often linked to right-hemisphere damage involving parietal-frontal networks and can make rehabilitation and safety planning very challenging. It’s different from simply denying an illness or having a mood problem; it’s a perceptual gap in self-awareness. For example, someone might insist their arm works normally despite being unable to move it, or fail to acknowledge neglect symptoms. Other described issues map to unrelated conditions—difficulty recognizing faces is a distinct condition called prosopagnosia, language problems like aphasia involve speech, and mood disorders involve changes in affect—so the statement about lacking awareness of the illness best fits anosognosia.