Definition: this cerebral disorder has three major components: optic ataxia (q.v.), or the impairment of visually-guided hand movements; ocular apraxia, or the inability to project voluntary gaze to certain points in the peripheral fields despite intact eye movements; and simultanagnosia, or visual inattention to objects in the periphery of the visual field; due to bilateral lesions in the parietooccipital region.
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