“Sudden insomnia can be an early symptom of two incurable neurological diseases.”
Medianews.az reports that this was said by neurologist Yekaterina Demyanovskaya.
In Parkinson's disease, insomnia and REM phase behavioral disorders (moving, talking, flailing arms and legs during sleep) can appear several years before typical motor symptoms — tremors and muscle stiffness.
The same situation is observed in Alzheimer's disease: in the early stage, due to disruption of circadian rhythms, the person has difficulty falling asleep at night, frequently wakes up, and feels strong sleepiness during the day.
Medianews.az