Apperceptive agnosia
Each patient that suffers from apperceptive agnosia does not have brain damage in exactly the same area. However, brain damage in proximity to the occipital lobe is largely correlated with the patterns of deficit seen in apperceptive agnosics. For example, patient JB suffered extensive damage to the parietal-occipital areas to the left cerebral hemisphere leading to his deficit in the ability to name distinguish between structurally similar object.
Apperceptive agnosia
Following Hermann Munk's identification of a condition he called "Seelenblindheit" (mind-blindness) Heinrich Lissauer published an exhaustive diagnostic evaluation of a patient who could not, or only with great difficulty, visually identify common objects. Because primary visual processing was intact, Lissauer considered the possible diagnostic distinction between deficits in perception (apperceptive agnosia) and in recognition (associative agnosia).