APA Dictionary of Psychology

a spatial and attentional disorder resulting from bilateral lesions in the parieto-occipital regions of the brain. It consists of inability to visually guide the hand to an object (optic ataxia), inability to change visual gaze (oculomotor apraxia), and inability to recognize multiple stimuli in a scene and understand their nature as a whole (simultanagnosia; see visual agnosia). [first described in 1909 by Rudolf Bálint (1874–1929), Hungarian physician]

a rare cortical syndrome characterized by simultanagnosia (difficulties in simultaneously processing multiple items), optic ataxia (deficits in visually guided limb and eye movements), and oculomotor apraxia (spatial disturbances of visual attention), associated with bilateral parietal lobe lesions. Also called Balint-Holmes syndrome. [identified by and named in 1909 for Austro-Hungarian neurologist and psychiatrist Rezső Bálint]