<prompt> Hallucination which occur at sta of sleep are known as ?Hypnogogic hallucinationHypnopompic hallucinationJactatio capitis nocturnaReflex hallucinations  <response>: Hypnogogic hallucination - occur while going to sleep. Hypnopompic hallucinations - occur while getting up from sleep Jactatio capitis nocturna or rhythmic movement disorder is a neurological disorder characterized by involuntary movements, usually of head and neck, before and during sleep. In reflex hallucinations, stimulus in one modality results in development of hallucination in another modality 