Sleep disorders are more common than you think. More than a quarter of all adults suffer from them. Not always chronic, sometimes only a few times in a life.
Talking in your sleep
Talking in your sleep ranges from mumbling to full sentences. Causes are stress, fever or alcohol. It occurs more often in men and children.
Sleepwalking
Sleepwalking occurs in deep sleep. It is dangerous to wake the sleepwalker, because coordination and judgement are strongly reduced. Guide the person calmly back to bed. Simple precautions, a door that can lock, no loose objects on the floor, are usually enough.
Periodic limb movements
Periodic limb movements are uncontrollable muscle contractions in the legs or arms. Not a muscle disease, but it disturbs deep sleep.
Sleep paralysis
Sleep paralysis is the feeling of waking but being unable to move. It occurs in REM sleep, sometimes accompanied by hallucinations. Half of all people experience it at some point. The cause is still being studied.
When to see a doctor
When a sleep disorder persists, for weeks, and begins to weigh on your day, then it is time for someone who looks at it professionally.