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  2. Hallucination - Wikipedia

    en.wikipedia.org/wiki/Hallucination

    A hallucination is a perception in the absence of an external stimulus that has the compelling sense of reality. [6] They are distinguishable from several related phenomena, such as dreaming (), which does not involve wakefulness; pseudohallucination, which does not mimic real perception, and is accurately perceived as unreal; illusion, which involves distorted or misinterpreted real ...

  3. Auditory hallucination - Wikipedia

    en.wikipedia.org/wiki/Auditory_hallucination

    In people with psychosis, the premier cause of auditory hallucinations is schizophrenia, and these are known as auditory verbal hallucinations (AVHs). [16] In schizophrenia, people show a consistent increase in activity of the thalamic and striatal subcortical nuclei , hypothalamus , and paralimbic regions; confirmed by PET and fMRI scans.

  4. Musical hallucinations - Wikipedia

    en.wikipedia.org/wiki/Musical_hallucinations

    Musical hallucinations can occur in people who are physically and mentally healthy, and for them, there is no known cause. [7] Most people find their musical hallucinations obtrusive, and wish to be rid of them, while others welcome them. In addition, investigators have pointed to factors that are associated with musical hallucinations.

  5. Doctors Say This Nighttime Behavior Can Be A Sign Of Dementia

    www.aol.com/doctors-nighttime-behavior-sign...

    Hallucinations. Trouble sleeping. ... The doctor can look for potential underlying causes, including dementia, medication effects, or environmental factors, Elhelou says. From there, they can ...

  6. Peduncular hallucinosis - Wikipedia

    en.wikipedia.org/wiki/Peduncular_hallucinosis

    Peduncular hallucinosis (PH) is a rare neurological phenomenon that causes vivid visual hallucinations that typically occur in dark environments and last for several minutes. Unlike some other kinds of hallucinations, the hallucinations that patients with PH experience are very realistic, and often involve people and environments that are ...

  7. Positive visual phenomena - Wikipedia

    en.wikipedia.org/wiki/Positive_visual_phenomena

    It is only delusion that has serious psychiatric implications. The content of hallucinations is widely variable and can range from simple images including flashing or steady spots, colored lines and shapes (unformed hallucinations) to vivid objects, flowers, animals and persons (formed hallucinations).

  8. Tactile hallucination - Wikipedia

    en.wikipedia.org/wiki/Tactile_hallucination

    Tactile hallucination is the false perception of tactile sensory input that creates a hallucinatory sensation of physical ... The causes of RLS are generally unknown ...

  9. Psychosis - Wikipedia

    en.wikipedia.org/wiki/Psychosis

    Hallucinations may command a person to do something potentially dangerous when combined with delusions. [19] So-called "minor hallucinations", such as extracampine hallucinations, or false perceptions of people or movement occurring outside of one's visual field, frequently occur in neurocognitive disorders, such as Parkinson's disease. [20]