First, the sleeping problems.
The clock hits 1 a.m, you lay awake in bed. Your mind is empty, it wanders, you continue to lay there.
Then 3 a.m
Finally, by 4 a.m, you fall into a light doze only to woken up at 7 a.m, searching for coffee.
If this narrative sounds familiar, you may be at risk for a neurodegenerative disorder later in your life.
Sleeping problems often accompany.
Causation or correlation?