“His first misperceptions occurred when he was in a nightclub; the skin of the other dancers, even their faces, seemed to be covered with tattoos. At first, he thought the tattoos were real, but they ...

When someone sees something that isn’t there, people often refer to the experience as a hallucination. Hallucinations occur when your sensory perception does not correspond to external stimuli.

Not seeing the left (or right) side can occur with occipital or parietal lobe damage. In my last post, I mentioned how the parietal lobes help to focus attention, and that it is asymmetric. Although ...