The development of nightmares later in life could be an early sign of Parkinson's disease, according to new research in older men.
"While we need to carry out further research in this area, identifying the significance of bad dreams and nightmares could indicate that individuals who experience changes to their dreams in older age – without any obvious trigger – should seek medical advice."
Yet until now, it hasn't been clear if these symptoms were a byproduct of Parkinson's or prodromal, which is the term scientists use for minor symptoms that appear before major symptoms arrive on the scene. Without further research to measure brain activity during sleep, it's hard to say what's going on at a biological level in Parkinson's patients who experience nightmares.
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