A neurological phenomenon in which a person perceives a sensory stimulus (visual, tactile, or auditory) from one side of the body if it is presented alone, but does not notice it when a stimulus is simultaneously delivered from the opposite side. More often it occurs when the parietal lobe is damaged, especially the right hemisphere, and is often combined with unilateral spatial neglect. Sensory extinction reflects disturbances in attention and the integration of sensory information, rather than a loss of basic sensitivity.