Abstract
I present a male patient who began to have slowly progressive visual agnosia and visuo-spatial agnosia at the age of 60. The visual agonosia consisted of prosopagnosia, object agnosia, picture agnosia, and cerebral dyschromatopsia. The visuo-spatial agnosia included left hemispatial neglect, psychic paralysis of gaze, and visual inattention. Because of a difficulty in copying figures and matching identical figures, the visual agnosia was considered to be the apperceptive type. On the other hand, memory disturbances, aphasia, dementia had not appeared until the end stage of the illness. All these manifestations suggested that the illness resembled posterior cortical atrophy. Neuropsychological points in this case were those as follows : 1) the visuo-spatial agnosia considerably contributed to the occurrence of the apperceptive visual agnosia ; 2) in spite of the presence of severe visual agnosia and visuo-spatial agnosia, the patient was able to walk without bumping into obstacles.
