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||conduction, disfigurement, mononeuropathy, progression, simplex, sensitivity, viral, statistics, rubella, pregnancy, recur, inflammation, gradual, original, difficulty, corticosteroids
||Sir Charles Bell
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Feedback on Bell's Palsy
By Jennifer Kenny
1 Can you imagine going to bed one night and being fine, just to wake up with half of your face paralyzed? It sounds like something out of a medical TV drama, but for some people it's real life. It happens more than you might think. It's a condition called Bell's palsy.
2 What exactly is Bell's palsy? It is an acute case of cranial mononeuropathy VII, which is a fancy way of saying it's a disorder involving a single nerve - cranial nerve VII. The 7th cranial nerve is the nerve that controls the movement of the face muscles. As a result of this condition, the facial muscles weaken or become paralyzed.
3 How did Bell's palsy get its name? Sir Charles Bell was a Scottish surgeon around two hundred years ago. He specifically studied this nerve and so the condition is named for him.
4 What are the signs and symptoms of Bell's palsy? Most people wake up and find the symptoms are just there. Others have a strange sensation in the morning, such as a dry eye, and then the rest of the symptoms appear as the day goes on. Then the progression of symptoms is quick. In general, the face may be paralyzed on one side. The face feels stiff and pulled to one side. The eye on the affected side might have trouble closing; therefore it may be very dry. Some people complain of a lack of tears; some complain of excessive tearing. There's often sensitivity to light. The condition causes problems with facial movement. As a result, drooling may occur. The face droops. Facial expressions will be difficult. There will also be difficulty eating and drinking. Taste may be distorted. People report a sensitivity to sound, pain in or near the ear, and sometimes headaches. Some people complain of a runny nose; some people complain of a stuffy nose.
5 What causes Bell's palsy? Sometimes it's not very clear. Doctors and scientists have concluded that viral and bacterial infections appear to be the main causes. The herpes simplex virus (HSV-1) appears to be the cause in over sixty percent of cases of Bell's palsy. Most people have been exposed to this virus, with or without developing cold sores. Then it lays dormant. When and if it is reactivated later at the facial nerve, as a result of stress, lack of sleep, or illness, the body reacts and causes antibodies which cause inflammation. If there's too much inflammation, the nerve can compress and not be able to send signals. Without signals, the muscles are temporarily weak or paralyzed. Besides HSV-1, other viruses such as Epstein-Barr, rubella, and mumps can have the same effect. In addition, other triggers of Bell's palsy include Lyme disease and otitis media, or ear infection.
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