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 ...

The chief clinical features of FFI include a progressive and ferocious insomnia, waking "sleep," hallucinations, autonomic disturbances suggestive of sympathetic overdrive (tachycardia ...

Met-Met patients demonstrate a different sleep pattern than Met-Val patients, including severe fragmentation, brief but repeated episodes of sudden-onset REM (with oneiric enactment), and an ...