Oneirophrenia

History

Ladislas J. Meduna, who also discovered a form of shock therapy using metrazol, studied oneirophrenia in the 1950s. Although recognized as a specific condition then, it was not investigated in depth until the 1960s. Early research closely linked oneirophrenia with schizophrenia due to overlapping symptoms, but later work established it as a distinct disorder. Meduna identified apperception disturbance as a core symptom, affecting vision, proprioception, interoception, hearing, and smell, often with foggy central vision.

Patients experience a sense of unreality that they struggle to accept, with initial reactions of fear and confusion shaped by their pre-existing personality. Meduna described oneirophrenia as a primary illusionary psychosis resulting from disturbed carbohydrate metabolism in the brain, characterized by exogenous hallucinations similar to those in delirium or substance-induced states, unlike the endogenous hallucinations of schizophrenia.

Diagnosis

Oneirophrenia is often confused with schizophrenia, but key differences exist. It involves a confusional state and clouding of consciousness without the dissociative symptoms typical of schizophrenia.

Oneirophrenia typically begins with an inability to focus, whereas schizophrenia often starts after a traumatic event. The dream-like derealization can progress to delusions and hallucinations, making it a schizophrenia-like acute psychosis that remits in about 60% of cases within two years. An estimated 50% or more of schizophrenic patients experience oneirophrenia at least once.

Did You Know?

• Oneirophrenic patients are resistant to insulin, and injected glucose takes 30 to 50% longer to return to normal glycemia.
• No known treatment currently exists for oneirophrenia.