Slowly progressive visual agnosia or apraxia without dementia.

Two patients manifested a progressive impairment of visuoperceptive abilities and one patient a progressive generalized apraxia, in the absence of dementia and oral language disorders. The disease started in the presenium and the follow-up was of five, two and half and two years, respectively. The relation of these clinical pictures to cases of generalized dementia and to cases with isolated, progressive aphasia is discussed.