Movements, vivid dreams and acting out dreams
Sleep disturbances are among the most common non-movement symptoms of Parkinson's disease.
Key points
- Rapid eye movement (REM) sleep behaviour disorder (acting out dreams) is often an early symptom of Parkinson’s disease, sometimes appearing years, even decades, before tremor, stiffness or slowness of movement (bradykinesia) develop.
- REM sleep disorder is also a symptom of Lewy body dementia.
- In these conditions, dream enactment happens because nervous system changes disrupt the normal paralysis of muscles during dream sleep, allowing physical movement, talking or shouting during dreams.
- Practical guidance for patients and bed partners is to make the bedroom safer (remove breakables, use a bolster pillow) rather than relying on medication alone.
- Your GP or specialist can guide you on medication options for dream enactment, though evidence for benefit is limited. They can also advise on managing excessive daytime sleepiness.
- Some Parkinson's medications can also worsen daytime sleepiness and sleep quality, so it is recommended that you discuss any sleep issues with your care team rather than managing them in isolation.
Next steps:
The symptoms of sleep disturbance can consist of:
- persistent daytime drowsiness or unintentionally falling asleep during the day
- punching, kicking or falling out of bed while dreaming
- sleep that doesn't feel refreshing despite spending long periods in bed
- talking, shouting or making sudden movements during sleep
- vivid, often unpleasant or action-packed dreams.
Sleep problems are extremely common in the general population. Parkinson's disease and dementia with Lewy bodies are only a couple of many possible causes.
Other contributors include:
- age-related changes in sleep pattern
- certain medications, including some Parkinson's drugs
- mood disorders such as depression or anxiety
- sleep disorders such as sleep apnoea or restless legs syndrome
- undertreated night-time stiffness or pain conditions.
When to consider specialist review
Speak with your GP or neurologist if:
- daytime sleepiness is affecting your safety (eg while driving) or daily function
- dream-enactment behaviour is causing injury or significant disruption
When to seek urgent help
Seek urgent medical attention for:
- a sleep-related injury to yourself or your bed partner
- a sudden or marked change in alertness or confusion alongside sleep changes.
These symptoms can indicate a separate problem requiring prompt assessment rather than routine management.