A decrease in the normal blinking frequency (less than 14-17 times per minute) may be a sign of the development of Parkinson’s disease. In this respect reports The Daily Mail cited the views of medical staff from the American Parkinson’s Disease Association (APDA).
It has been announced that the normal blinking frequency in humans is approximately 14-17 times per minute. Blinking is a natural mechanism to keep the eyes moist and clean the corneal surface. Some studies have shown that blink rate reflects the activity of dopamine (a neurotransmitter) in the brain. The lower the dopamine level, the longer the interval between eyelid closing.
According to experts at the American Parkinson’s Disease Association, the hallmark of this disease is the loss of dopamine-producing nerve cells. Such undesirable changes not only cause tremors, but also reduce the frequency of blinking.
It is also stated that rare eyelid closure may be a symptom of another pathology (Graves disease). This is an autoimmune disease caused by excessive secretion of thyroid hormones by the thyroid tissue.
Previously was named An unexpected risk factor for glaucoma.
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Source: Gazeta
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