Hypnogogic hallucinations are seen in ?
Depression
Mania
Narcolepsy
Schizophrenia
Ans. is 'c' i.e., Narcolepsy Narcolepsy This is characterized by excessive day time sleep, often disturbed night time sleep and disturbances in the REM sleep. Age of onset is between 10-20 years. There is irresistable desire to sleep and bouts of sudden sleep each lasting for 10-30 minutes occuring during day time. In majority of cases narcolepsy is associated with one or more accessory symptoms :? Cataplexy :- It is the most common accessory symptom and is characterized by sudden decrease in muscle tone either, local or generalized. Hypnagogic hallucination :- Hallucination occuring just before falling asleep. When hallucination occurs just before awakening it is called hyponopompic hallucinations. Sleep paralysis (least common).