Cases with<unk>  appear to have medial ventral lesions in the extrastriate cortex. Those who have<unk>  are better able to identify inanimate than animate items, which indicates processes that lead to accurate perceptual organization of visual information can be impaired. This is attributed to the importance of perceptual updating of stored visual knowledge, which is particularly important for classes of stimuli that have many perceptual neighbors and/or stimuli for which perceptual features are central to their stored representations. Patients also show a tendency to process visual stimuli initially at a global rather than local level. Although the grouping of local elements into perceptual wholes can be impaired, patients can remain sensitive to holistic visual representations. When determining whether a patient has form agnosia or<unk> , an Efron shape test can be performed. A poor score on the Efron shape test will indicate form agnosia, as opposed to<unk> . A good score on the Efron shape test, but a poor score on a figure-ground segmentation test and an overlapping figures test will indicate<unk> . A patient with<unk>  will find it hard to group and segment shapes, especially if there are overlapping animate items or they can over segment objects with high internal detail. However, the patient should have and understand basic coding of shape.
Integrative agnosia
Visuospatial dysgnosia
Apperceptive agnosia
Social-emotional agnosia
Phonagnosia
Asomatognosia
Anosognosia
Associative visual agnosia