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  2. Visual snow syndrome - Wikipedia

    en.wikipedia.org/wiki/Visual_snow_syndrome

    In September 2021, two studies [30] found white matter alterations in parts of the visual cortex and outside the visual cortex in patients with visual snow syndrome. In November 2023, a study [ 31 ] revealed that glutamate and serotonin are involved in brain connectivity alterations in areas of the visual, salience, and limbic systems in VSS.

  3. Visual hallucination - Wikipedia

    en.wikipedia.org/wiki/Visual_hallucination

    Studies show that visual hallucinations are present in 16%–72% of patients with schizophrenia and schizoaffective disorder. [5] [22] [16] [14] In delirium, visual hallucinations have been observed in 27% of patients. [14] [13] Furthermore, visual hallucinations are reported in over 20% of individuals with dementia with Lewy bodies. [14] [23]

  4. Peduncular hallucinosis - Wikipedia

    en.wikipedia.org/wiki/Peduncular_hallucinosis

    Peduncular hallucinosis (PH) is a rare neurological disorder 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 familiar to the affected individua

  5. Could you have brain fog? How to tell and what to do - AOL

    www.aol.com/could-brain-fog-tell-134300121.html

    Brain fog is a term that describes a variety of cognitive issues that seem very real to you but might not be easy for others to see and understand, including doctors. And these cognitive issues ...

  6. What Is Brain Fog? Here’s What to Know If You’ve ... - AOL

    www.aol.com/lifestyle/brain-fog-know-ve-feeling...

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  7. Illusory palinopsia - Wikipedia

    en.wikipedia.org/wiki/Illusory_palinopsia

    Illusory palinopsia is often worse with high stimulus intensity and contrast ratio in a dark adapted state.Multiple types of illusory palinopsia often co-exist in a patient and occur with other diffuse, persistent illusory symptoms such as halos around objects, dysmetropsia (micropsia, macropsia, pelopsia, or teleopsia), Alice in Wonderland Syndrome, visual snow, and oscillopsia.

  8. Positive visual phenomena - Wikipedia

    en.wikipedia.org/wiki/Positive_visual_phenomena

    Hallucination is defined as visual perception without external stimulation. It must be distinguished whether the individual is able to recognize that the perception is not real, also called pseudo-hallucination, or that the individual endorses it as real, also called delusion.

  9. Hallucinogen persisting perception disorder - Wikipedia

    en.wikipedia.org/wiki/Hallucinogen_persisting...

    Hallucinogen persisting perception disorder (HPPD) is a non-psychotic disorder in which a person experiences apparent lasting or persistent visual hallucinations or perceptual distortions after using drugs, [1] including but not limited to psychedelics, dissociatives, entactogens, tetrahydrocannabinol (THC), and SSRIs.