Which deficit is the inability to appreciate the meaning of an object by its appearance, despite an intact visual system, often described as part of Kluver-Bucy syndrome due to anterior temporal lesions?

• A. Agnosia
• B. Palinopsia
• C. Balint syndrome
• D. Prosopagnosia

Answer: (A)

The main idea is a higher-order perceptual deficit: recognizing objects by what they look like despite normal vision. This is agnosia. When the visual system can detect shapes, colors, and edges, but the meaning or identity of the object can’t be ascertained, higher-level processing in the ventral stream and semantic associations is impaired. In Kluver-Bucy syndrome, bilateral anterior temporal lesions can produce this kind of visual object agnosia, sometimes described as psychic blindness, where perception is intact but interpretation is lost.

Distinguishing from the other options: prosopagnosia is a face-specific recognition problem, not general object recognition. Balint syndrome involves problems with visual attention and coordination (simultanagnosia, ocular apraxia, optic ataxia) rather than a failure to assign meaning to objects. Palinopsia is the persistence or recurrence of visual images after the stimulus is gone, not a recognition deficit. So the description fits agnosia—the inability to appreciate an object's meaning by appearance despite intact visual input.