Sleep disorders associated with rapid eye movements and accompanied by nightmares and very vivid dreams, involve a risk of developing Parkinson's disease, the researchers found.
Alex Iranzo, a neuroscientist at the Hospital of Barcelona conducted three studies in order to prove a link between these two disorders, writes The Times of India. The latter finding he used a test that determines the level of dopamine in the brain. It was found in patients with Parkinson's disease it is lowered.
With a deficit of dopamine Parkinson's disease in a black substance - the area of the brain associated with learning and coordination of movements. Due to lack of the hormone dopamine in humans develops tremors, muscle rigidity. In turn, the hormone released when a person experiences the pleasure of eating, sex, drugs.
The scientist watched over the health of a control group of volunteers for three years. After that period, hormone levels fell by 8% due to age-related changes. But a group of people with sleep disorder reduction was 20%.
When completed a three-year period, three of 20 patients with sleep disorders were diagnosed with Parkinson's disease, and reduce the concentration of dopamine in their recorded at 30%.