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Home Q & A Board Biology-Related Homework Help Anatomy and Physiology
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kelly15 kelly15
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11 years ago
   
Bell's palsy is defined as a paralysis or weakness of muscles associated to one side of the face causing the damaged side to droop. When this takes place, are there specific nerves within the CNS that are ultimately affected  that would cause drooping? If so, which nerves are affected and If not, why?
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11 years ago
Bell's Palsy affects CN VII, a pair of mixed cranial nerves which control the left and right portions of the face. Sensory fibers of CN VII controls taste receptors on the anterior portion of the tongue while motor fibers control facial expressions, as well as tear and salivary glands. Drooping of one side of the face is caused by interruption to the function of one of the facial nerves which ultimately results in a loss of facial muscle tone.
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#2
11 years ago
The nerves affected by Bell's Palsy are the seventh cranial nerves, known as the facial nerves. There is one pair of these nerves. In most cases only one of these nerves is affected at a time. The inflammation or damage of this nerve causes the symptoms associated with Bell's palsy.
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