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Bell’s palsy
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Muscles affected:
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Frontalis – Elevates eyebrows, wrinkles skin of forehead
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Orbicularis oculi – Closes eyes
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Orbicularis oris – Closes mouth, purses and protrudes lips
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Buccinator – Aids mastication, tenses cheeks in blowing and whistling, aids closure of mouth
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Platysma – Depresses the mandible and lower lip and tenses the skin of the anterior neck
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Bell's palsy is an inflammatory process of the facial nerve leading to its compression along this narrow segment of the fallopian canal
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Other symptoms may include:
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Rapid onset of mild weakness to total paralysis on one side of your face — occurring within hours to days
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Facial droop and difficulty making facial expressions, such as closing your eye or smiling
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Drooling
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Pain around the jaw or in or behind your ear on the affected side
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Increased sensitivity to sound on the affected side
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Headache
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A loss of taste
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Changes in the amount of tears and saliva you produce
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https://www.mayoclinic.org/diseases-conditions/bells-palsy/symptoms-causes/syc-20370028