Hallucinations are unreal sensory experiences, such as hearing or seeing something that is not there. Any of our five senses (vision, hearing, taste, smell, touch) can be involved. Most often, when we ...

Jason Yosar does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their ...

Hallucinations result in dramatic disruptions in perception and cognition, but the changes in brain activity that underlie such alterations are not well understood. In a study publishing March 26 in ...

Hallucinations underlie many neurological conditions, drug-induced or otherwise. Narcolepsy, schizophrenia, and Alzheimer’s disease are all associated with moments when one visually perceives the ...

Migraine is a neurological condition that affects about 39 million people in the United States. Aura symptoms can include trouble speaking, tingling, weakness, or vision changes. Visual aura is common ...

Dr. Oliver Sacks is probably best known as the real inspiration for the caring neurologist portrayed by Robin Williams in the Oscar-nominated film, Awakenings, which was based on his autobiographical ...

Charles Bonnet syndrome is a condition in which someone with poor vision experiences visual hallucinations, or seeing things that aren’t there. It occurs in individuals who have lost a significant ...

Have you ever felt the strong sensation that someone is behind you, so intense that you turn around, only to see that no-one is there? This is a 'presence hallucination'. Presence hallucinations are ...