Hallucination [Neurosurgery Wiki]

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====== Hallucination ======

[[Hallucinosis]] and hallucination are related but not the same. They both involve perceptual disturbances, particularly in the realm of sensory experiences like hearing, seeing, or feeling things that are not real. However, there are important differences between the two terms:

Hallucination:

A hallucination is a sensory perception that occurs in the absence of a real external stimulus. It involves experiencing something that is not actually there, such as hearing voices, seeing objects, or feeling sensations that others do not perceive.
Hallucinations can affect any of the five senses, including auditory (hearing voices or sounds), visual (seeing things), tactile (feeling things on the skin), olfactory (smelling odors), and gustatory (tasting things).
Hallucinosis:

Hallucinosis is a more specific term used to describe a syndrome or a pattern of persistent, complex, and often distressing hallucinations. These hallucinations are typically vivid and may be difficult to distinguish from reality.
Hallucinosis often implies a more severe and prolonged form of hallucination, and it may be associated with specific medical or psychiatric conditions.
In summary, while both hallucination and hallucinosis involve altered sensory perceptions, hallucinosis is a term often used to describe a specific type of hallucination that is particularly intense, prolonged, and may be associated with certain underlying medical or psychiatric conditions. Hallucinations, on the other hand, are a broader category that encompasses various types of sensory disturbances.
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A hallucination is a [[perception]] in the absence of external stimulus that has qualities of real perception. Hallucinations are vivid, substantial, and are perceived to be located in external objective space. They are distinguishable from these related phenomena: [[dream]]ing, which does not involve wakefulness; [[illusion]], which involves distorted or misinterpreted real perception; imagery, which does not mimic real perception and is under voluntary control; and pseudohallucination, which does not mimic real perception, but is not under voluntary control.

Hallucinations also differ from "delusional perceptions", in which a correctly sensed and interpreted stimulus (i.e., a real perception) is given some additional (and typically absurd) significance.

[[Auditory hallucination]]

[[Visual hallucination]]s.
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