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.
Mirrored-self misidentification
Viewing one's own facial reflection in the mirror causes neurological changes in the right inferior frontal gyrus, the right inferior occipital gyrus, the right inferior parietal lobe, and the right parietal area. These changes, which all occur in the right hemisphere, highlight the role of the right hemisphere in self-related cognition and processing and support the theory that the right hemisphere is the most likely substrate for the "self" in the brain. When the right hemisphere is damaged in any way, the patient will most likely lose the ability to recognize one's face - the most common feature of self-recognition. When paired with mirror agnosia or impaired facial processing, damage in any of these areas of the right hemisphere of the brain can lead to difficulties in self-recognition. Delusions such as mirrored-self misidentification can then develop.