[25] Sleep deprivation may result from endogenous factors (such as aging or chronic insomnia) or exogenous prevention of sleep state (such as deliberate waking). The longest period of voluntary ...

They can then pass this mutation on to their children in the regular way. Related: Not all insomnia is the same — in fact, there may be 5 types Symptoms: The hallmark symptom of FFI is insomnia ...

Context: Fatal familial insomnia (FFI) is a genetically transmitted neurodegenerative prion disease that incurs great suffering and has neither a treatment nor a cure. The clinical literature is ...