Why do people hallucinate when tired or sleep deprived?

Depending on the length of sleep deprivation, approximately 80% of normal people in the population will eventually have hallucinations. Most of these are visual hallucinations. In contrast, people with schizophrenia often have auditory hallucinations, hearing sounds (often voices) that are not there. read more

Tired and Sleep Deprived. Other mental illnesses like Parkinson's. The reason we hallucinate is due to faulty perception. Being tired and sleep deprived is almost like temporary acute schizophrenia as far as perception is concerned. read more

The Role of Sleep Deprivation in Hallucinations. There are many reasons that people get inadequate sleep and become sleep deprived, from the demands of work and even home life to sleep problems like insomnia. read more