NTA-NET (UGC-NET) Psychology (04) Mental Disorders-Hallucination Study Material (Page 1 of 2)

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Hallucination: Difference between Hallucinations and Other Terms and Stages of Hallucination

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A hallucination is a perception in the absence of a stimulus. In a stricter sense, hallucinations are defined as perceptions in a conscious and awake state in the absence of external stimuli, which have qualities of real perception, in that they are substantial, and located in external objective space.

Difference between Hallucinations and Other Terms

The definition above distinguishes hallucinations from the related phenomena of

  • Dreaming, which does not involve wakefulness
  • Illusion, which involves distorted or misinterpreted real perception
  • Imagery, which does not mimic real perception and is under voluntary …

… (108 more words) …

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Hallucination: Etiology of Hallucination

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Etiology of Hallucination

Hallucinations can be caused by and classified into a number of factors.

  • Hypnagogic Hallucination: Hallucinations that occur just before falling asleep, insight is preserved
  • Peduncular Hallucinosis: These usually occur in the evenings, but not during drowsiness, as in the case of hypnagogic hallucination. The subject is fully conscious and able to interact with the hallucinatory characters. Insight remains intact. This can be polymodal
  • Delirium Tremens: This is highly variable, possibly polymodal. Individuals may be agitated and confused. Insight is gradually reduced with the progression of this disorder.
  • Parkinson՚s Disease: Parkinson՚s disease is link…

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