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 ...

Hallucinogen persisting perception disorder (HPPD) is a rare medical condition that can cause visual disturbances (sometimes called flashbacks) if you’ve taken hallucinogenic drugs in the past. With ...

AI hallucinations produce confident but false outputs, undermining AI accuracy. Learn how generative AI risks arise and ways to improve reliability.

People with Charles Bonnet syndrome (CBS) experience complex visual hallucinations that can seem very real. While there is no cure, people can take simple steps to reduce or sometimes stop their ...

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A food recall from Australia sheds light on an unusual aspect of brain chemistry. By Yan Zhuang Delirium. Fever. Hallucinations. Not what you expect when adding baby spinach to a salad, but these are ...